Key Takeaways
- The Supreme Court's February 2026 IEEPA ruling triggered 2,500+ CIT cases covering $175-179B in potential tariff refunds — the largest customs litigation event in modern US trade law history, and one that immediately separated firms with real CIT infrastructure from those with marketing-rebrand task forces.
- Baker McKenzie's 2026 survey of 600 senior in-house lawyers found 79% already cite tariff exposure as a primary dispute driver, while 38% say their disputes budget is already inadequate — meaning GCs need execution partners, not capability pitches.
- Crowell & Moring (~200 CIT filings) and Sidley Austin (~160 filings) are leading the docket race; firms that lacked pre-existing trade infrastructure before the ruling are now competing for panels that are already being formed.
- USTR's March 2026 Section 301 investigations targeting 76 countries ensure structural trade litigation demand that outlasts the IEEPA refund cycle and provides annuity-style revenue for practices built beyond CIT litigation alone.
- The talent competition for former USTR, Commerce, and CIT bar attorneys is at peak intensity — Baker McKenzie's April 2026 hire of former Deputy Assistant USTR Nat Halvorson signals that firms with genuine strategic intent are not waiting for the market to cool.
The firms that built credible tariff task forces before February 20, 2026 are sitting on one of the largest litigation windfalls in trade law history. The Supreme Court's 6-3 decision in Learning Resources, Inc. v. Trump, which invalidated the IEEPA tariff regime, immediately generated more than 2,500 cases in the Court of International Trade (CIT), covering an estimated $175 to $179 billion in collected duties per Penn-Wharton Budget Model economists. Baker McKenzie's 2026 Global Disputes Forecast had already documented the underlying demand: 79% of 600 senior in-house lawyers at major multinationals identified tariffs, sanctions, and export controls as primary drivers of dispute exposure. The work existed before the ruling. The ruling doubled it. According to Bloomberg Law's analysis of CIT dockets, Crowell & Moring filed roughly 200 complaints and Sidley Austin filed approximately 160. Both firms had pre-existing trade infrastructure. The firms still assembling task forces in Q2 2026 are competing for a docket that is already being captured.
Why This Tariff Cycle Is Structurally Different — and Why Generic Trade Practices Are Being Left Behind
The 2018-2019 Section 301 cycle against China was a bounded event. Firms staffed up for exclusion request filings, the Biden administration held the tariffs largely in place without escalation, and the acute litigation demand plateaued. The current cycle has no equivalent ceiling. The Supreme Court's IEEPA ruling did not end the tariff era; it forced the administration to reconstitute its regime on different statutory authority. In March 2026, USTR launched two parallel Section 301 investigations: one targeting manufacturing overcapacity across 16 countries including China, the EU, Japan, India, Mexico, and Vietnam; a second targeting forced labor enforcement failures across 60 countries. The legal surface area is an order of magnitude larger than anything the first Trump term produced.
The CIT bar is also a bottleneck in ways it was not in 2018. When 2,500 cases land in a specialized tribunal that handles a fraction of that volume in a normal year, the attorneys who know CIT procedure, who hold standing relationships with the judges, and who understand customs protest mechanics become genuinely scarce resources. Section 301 exclusion work from 2018 to 2020 gave some firms a head start building that bench. Firms that did not staff for that cycle are now bidding for talent that does not exist in sufficient quantity.
Anatomy of a Tariff Task Force: How the Real Ones Are Actually Organized
The firms with genuine capability share one structural feature: they treat tariff work as cross-disciplinary from day one rather than routing it through a single practice group. Holland & Knight's task force draws from its International Trade group, its Public Policy and Regulation team (150+ Washington professionals), and its Litigation group, with former executive branch trade officials and former members of Congress embedded across the team. Greenberg Traurig assembled trade attorneys, tax attorneys, litigators, and policy advisors into a single unit. That breadth reflects a functional reality: IEEPA refund claims implicate customs protest filings, M&A purchase agreement structuring (specifically the allocation of refund rights between buyers and sellers), and multinational tax treatment of refund proceeds. A team of trade attorneys alone cannot execute the full scope. Sidley Austin has gone further still, publishing guidance on the secondary market for IEEPA refund claims, advising lenders, borrowers, and claims purchasers on the financial instruments now forming around the litigation.
The firms with marketing-rebrand task forces reveal themselves quickly in what they actually offer. Tariff classification and USMCA compliance are table stakes. What separates a capable unit is the ability to simultaneously handle CIT protest filings, advise on supply chain restructuring, navigate forced labor enforcement under the Uyghur Forced Labor Prevention Act, and counsel on M&A implications when a target company carries material IEEPA refund exposure. GCs with overloaded in-house teams are running this analysis in real time, and the panel decisions being made in Q2 2026 will shape mandate flow for years.
The 79% Problem: What Baker McKenzie's Survey Data Tells Us About Real Client Need
The headline from Baker McKenzie's 2026 Global Disputes Forecast is already widely cited: 79% of 600 senior in-house lawyers at major multinationals identify tariffs, sanctions, and export controls as major factors driving disputes exposure. The more operationally significant figure is 38%: the share of those same respondents who say their 2026 disputes budget is inadequate for current risk levels. A further 55% cite resource constraints as barriers to litigation preparedness.
These numbers mean GCs are not sitting on discretionary spend waiting to be activated. They are under-resourced against a risk they have already quantified. The firms that win this work arrive with a structured scope — IEEPA refund audit, CIT protest filing calendar, Section 301 comment submission strategy — rather than a capabilities presentation. Pitches do not solve a resourcing problem. The task force model exists to deliver multi-disciplinary execution at speed, and the firms that have operationalized it rather than merely named it are the ones GCs are calling.
The Conflicts Time Bomb
The trade bar has a structural problem the tariff boom is surfacing at scale. Many firms representing large importers seeking IEEPA refunds also hold longstanding relationships with domestic manufacturers who benefited from those same tariffs. An importer pursuing Section 301 exclusions and a domestic steel producer lobbying to maintain Section 232 protections cannot both be represented by the same counsel on overlapping matters.
Firms that opportunistically expanded their trade rosters on both sides of the importer/exporter divide since January 2025 are one engagement letter away from a conflicts crisis. The CIT's concentrated docket compounds the exposure: when every significant importer in an industry is filing the same refund claim, a firm that accepted a trade association retainer from the competing domestic industry in 2024 may find itself conflicted out of the most lucrative litigation opportunity in the space. This is a predictable structural consequence of the speed at which firms have grown their trade client lists without conducting the conflicts analysis their existing relationships require.
The Talent Moat: Why Former USTR and CIT Bar Attorneys Are the Only Hires That Create Durable Advantage
Former USTR, Commerce Department, and CIT attorneys are not merely credentialing signals in trade practice. They are functional requirements. USTR attorneys understand Section 301 investigation mechanics from the inside, which matters because the March 2026 investigations are structured differently from the 2018 actions and carry distinct procedural timelines and comment requirements. Commerce attorneys with anti-dumping and countervailing duty experience know where administrative records are built and where they can be attacked. CIT practitioners have the docket fluency that 2,500 pending cases demand.
Baker McKenzie moved deliberately on this. In April 2026, the firm hired Nat Halvorson, former Deputy Assistant USTR for Monitoring and Enforcement, as a partner in its DC International Trade Practice. Halvorson directed Section 301 investigations covering semiconductors, automotive, and aerospace sectors — institutional knowledge that cannot be replicated by assigning a generalist litigator to a trade matter. The lateral market for this profile is already at peak intensity. US lateral partner hires hit a five-year high in 2025, with Washington DC recording 469 partner hires (second only to New York) and government sources accounting for 270 partner hires overall. The government alumni with the highest trade value are already accepting offers.
When the Tariffs Roll Back: How to Build a Practice That Outlasts the Political Cycle That Created It
The practices that will own this area through 2035 are not optimizing solely for IEEPA refund volume. They are building around a structural reality: trade law complexity spanning Section 301 investigations covering 76 countries, forced labor enforcement, USMCA dispute resolution, and export controls has durability that outlasts any single administration's tariff architecture. The SCOTUS ruling redirected the tariff regime from IEEPA to Section 301 statutory authority. Section 301 has its own administrative procedure, exclusion process, and litigation track — recurring work with no natural sunset.
The practices that avoid the boom-bust pattern that hollowed out several trade groups after 2020 are those investing now in customs advisory infrastructure alongside CIT litigation capacity. IEEPA refund claims will largely resolve within three to five years; the government's deadline to appeal the CIT's nationwide refund order runs through early June 2026, and a successful appeal could stay the refund process and extend litigation timelines further. Section 301 exclusion cycles, anti-dumping administrative reviews, and export control compliance programs are annuity revenue. The firms building both capabilities now will hold the client relationships and institutional knowledge to capture the next cycle, whatever statutory vehicle it operates through.
The window for establishing a credible market position is genuinely shorter than most practice group leaders will admit. The CIT docket is being captured now. The government alumni with the highest value are already accepting offers. GCs under budget pressure are forming panel relationships this quarter. Firms still in task force naming mode rather than client execution mode have already missed the first phase of this cycle.
Frequently Asked Questions
What did the Supreme Court decide in February 2026, and what does it mean for IEEPA tariff refunds?
In *Learning Resources, Inc. v. Trump*, the Court held 6-3 that IEEPA does not grant the president authority to impose tariffs, invalidating the broad tariff regime in place since early 2025. Penn-Wharton economists estimate $175-179 billion in IEEPA tariff collections are now subject to potential refund claims, and more than 2,500 individual CIT cases have been filed seeking those refunds. The government's deadline to appeal the CIT's refund order runs through early June 2026, meaning a stay could significantly delay actual payments and extend the litigation timeline.
Which law firms are currently leading the IEEPA tariff refund litigation at the Court of International Trade?
Bloomberg Law's analysis of CIT dockets shows Crowell & Moring filed approximately 200 IEEPA refund cases and Sidley Austin filed around 160, making them the two most active BigLaw firms in the post-ruling filing wave. Holland & Knight, Greenberg Traurig, WilmerHale, Ropes & Gray, and Skadden are also active participants, with varying depth of pre-existing CIT bar infrastructure and customs protest experience.
What are the USTR's March 2026 Section 301 investigations, and why do they extend the trade litigation timeline beyond IEEPA?
USTR launched two parallel Section 301 investigations in March 2026: one targeting manufacturing overcapacity across 16 countries (including China, the EU, Japan, India, Mexico, and Vietnam) and one targeting forced labor enforcement failures across 60 countries. These investigations will generate public comment periods, exclusion request processes, and eventual CIT litigation — sustaining demand for trade law expertise regardless of what happens to IEEPA refund claims or future tariff policy shifts.
Why do former USTR and Commerce Department attorneys command such a premium in today's lateral market?
Section 301 investigations, anti-dumping proceedings, and countervailing duty reviews are built on administrative records that government-side attorneys know from the inside — giving them procedural and strategic knowledge that cannot be replicated by a generalist litigator. Baker McKenzie's April 2026 hire of Nat Halvorson, former Deputy Assistant USTR for Monitoring and Enforcement who directed Section 301 investigations covering semiconductors and automotive sectors, illustrates the specific operational value this profile brings. US lateral partner hires hit a five-year high in 2025, with Washington DC recording 469 partner hires, and competition for trade government alumni is already at peak intensity.
How serious is the conflicts risk for firms that represent both importers and domestic manufacturers in the current tariff environment?
The risk is structural and immediate: IEEPA refund claimants (importers who paid the tariffs) and domestic manufacturers who benefited from tariff protection have directly adverse interests across Section 301 exclusion proceedings, trade remedy litigation, and lobbying activity. Firms that accepted retainers from domestic industry trade associations in 2024 while now seeking to represent importers in CIT refund actions face a conflicts analysis that will result in disqualification in many cases. The CIT's concentrated docket, where every major importer in a given industry may be filing the same claim, amplifies this exposure across the entire practice group.