Two weeks ago I wrote about the efforts of big business to defeat libertarian-leaning legislators in states across the country. To confirm my point, on the same day the article appeared the Michigan Chamber of Commerce endorsed the opponent of Rep. Justin Amash, the one of whom I had written, “Most members of Congress vote for unconstitutional bills. Few of them make it an explicit campaign promise.”

Now a battle is brewing in Congress that pits libertarians and Tea Party supporters against the country’s biggest businesses. The Wall Street Journal headlines, “GOP’s Attack on Export-Import Bank Alarms Business Allies.” The “rise of tea-party-aligned lawmakers” is threatening this most visible example of corporate welfare, and David Brat’s attacks on “crony capitalism” in his surprise defeat of Eric Cantor have made some Republicans nervous. Amash told the Journal, “There are some large corporations that would like corporate welfare to continue.”

The biggest beneficiaries of Ex-Im’s billions are companies such as Boeing, General Electric and Caterpillar, according to Veronique de Rugy, a senior research fellow at the Mercatus Center. Cato scholars have made the same point, including Aaron Lukas and Ian Vasquez in 2002 and Sallie James in 2011.

Matthew Yglesias of Vox notes, “The Export-Import Bank is a great example of the kind of thing a libertarian populist might oppose. That’s because the bank is a pretty textbook example of the government stepping in to arbitrarily help certain business owners.” And he points out that supporters of the Bank include the U.S. Chamber of Commerce, the National Association of Manufacturers, the AFL-CIO, Haley Barbour, and Dick Gephardt. He could have added Tom Donnelly of the American Enterprise Institute.

Rep. Adam Kinzinger (R‑IL) said he worried about “a libertarian theology that’s really starting to creep in.” I hope he’s right.