Senate Republicans will meet with President Trump Donald John TrumpBiden on Trump's refusal to commit to peaceful transfer of power: 'What country are we in?' Romney: 'Unthinkable and unacceptable' to not commit to peaceful transition of power Two Louisville police officers shot amid Breonna Taylor grand jury protests MORE at 3:30 p.m. Wednesday to raise concerns about his trade strategy, which has led to threats of retaliation from the nation’s biggest trade partners.

GOP senators said they received invitations from the White House last night and are expected to head down Pennsylvania Avenue shortly after 3 p.m.

Trump's decision to impose tariffs on aluminum and steel imports has set off fears of a larger trade war. Canada, Mexico and the European Union have all announced plans to retaliate against U.S. exports, and farm-state lawmakers fear U.S. agriculture could be hit hard.

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Trump has also discussed imposing tariffs on imports of foreign cars.

“If the president can get a better deal, I'm for a better deal, but you've got to understand that if you fail and there’s retaliation, agriculture is the first that’s retaliated against,” said Sen. Chuck Grassley Charles (Chuck) Ernest GrassleyThe Hill's 12:30 Report: Ginsburg lies in repose Top GOP senators say Hunter Biden's work 'cast a shadow' over Obama Ukraine policy Read: Senate GOP's controversial Biden report MORE (R-Iowa), who represents a state where agriculture is dominant.

Mexico announced Tuesday that it will impose a 20 percent tariff on U.S. pork. Iowa is by far the biggest pork producer in the United States.

GOP senators want to sit down with Trump to get a "better understanding of the end goals" of his trade strategy, according to a senior congressional aide.

Trump called Corker on Wednesday morning to try to persuade him to hold off on introducing the bill.

He argued that Corker’s bill could undercut his negotiating leverage with Mexico and Canada as he tries to restructure the 1994 North American Free Trade Agreement.

Corker told Trump that his bill would not hurt his ability to negotiate and pledged to go ahead with it.

"He expressed his concerns and I expressed my reasons for thinking this was exactly the right thing to do," Corker said. "He feels like it takes away his negotiating ability. It doesn't do that at all."