The U.S. Chamber of Commerce, the nation’s largest business lobbying group and customarily a close ally of President Donald Trump’s Republican Party, is launching a campaign on Monday to oppose Trump’s trade tariff policies, Reuters reported.

The new campaign, detailed first to Reuters, will provide an analysis of the financial hit each U.S. state stands take from potential retaliation to Trump’s tariffs. It argues that Trump is risking a global trade war that will hit the wallets of U.S. consumers.

“The administration is threatening to undermine the economic progress it worked so hard to achieve,” said Chamber President Tom Donohue in a statement to Reuters. “We should seek free and fair trade, but this is just not the way to do it.”