US Chamber of Commerce sounds alarm about a NAFTA pullout

America’s biggest business group is warning the Trump administration that a withdrawal from the North American Free Trade Agreement would be a “political and economic debacle” that would cost hundreds of thousands of U.S. jobs.

Talking with reporters Friday, John Murphy, a senior official with the U.S. Chamber of Commerce, said the chamber would work to rally support for the trade deal and against the administration’s hardline demand for concessions from Canada and Mexico. The comments were unusually blunt for America’s biggest business group.

The Trump administration, which has threatened to pull out of NAFTA . . .