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As Congress returns for a blink-and-you'll-miss-it session before the November elections, Republican leaders don't want any trouble.

They just want to make sure the government doesn't shut down at the end of the month, temporarily reauthorize a little-known federal lending agency, and get the heck out of town.

As usual, conservatives are not on board.

Two of the most vocal advocacy advocacy groups on the right, Club for Growth and Heritage Action, welcomed House Majority Leader Kevin McCarthy (R-Calif.) back to Washington on Monday with a letter warning him not to attach an extension of the Export-Import Bank to legislation funding the government through mid-December.

The 80-year-old bank, which helps U.S. businesses reach markets overseas, has become a flash point in the battle between establishment Republicans and the Tea Party. The bank is key to big companies like Boeing and a top priority of the Chamber of Commerce, but conservatives say it's a prime example of crony capitalism.

Congressional Republicans are plainly divided on the export bank, known inside the Beltway as "Ex-Im," but with the election near, party leaders want to save the debate for another day.