Previous backers of libertarian Liberty Justice Center include billionaires Robert Mercer and Richard Uihlein
Donald Trump’s tariff policy was derailed by a libertarian public interest law firm that has received money from some of his richest backers. The Liberty Justice Center filed a lawsuit against the US president’s “reciprocal” tariffs on behalf of five small businesses, which it said were harmed by the policy.
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For its lawsuit against Trump’s tariffs, the Liberty Justice Center gathered five small businesses, including a wine company and a fish gear and apparel retailer, and argued that Trump overreached his executive authority and needed Congress’s approval to pass such broad tariffs.

https://www.theguardian.com/us-news/2025/may/29/trump-tariffs-liberty-justice-center