Republican Sen. Chuck Grassley crossed party lines and teamed up with Sen. Maria Cantwell on new legislation Thursday that would pare back President Trump’s tariff authority as GOP unease

For too long, Congress has delegated its clear authority to regulate interstate and foreign commerce to the executive branch," Grassley said.

Tensions are rising within the Republican Party as key GOP senators criticize President Donald Trump's tariffs. Ted Cruz, in particular, is warning about serious consequences. As inflation skyrockets and the stock market drops,

A U.S. Senate bill that would require congressional approval for new tariffs gained more Republican support on Friday, in the second day of a stock market rout sparked by President Donald Trump's move to impose sweeping new taxes on imports.

It remains unknown whether Oklahoma's Republican U.S. senators will join other Republicans in backing a bipartisan tariffs bill.

Republican U.S. Senator Chuck Grassley introduced a bill on Thursday that would require congressional approval for new tariffs, the day after President Donald Trump unveiled sweeping new taxes on a vast array of imported goods.

A number of Republican legislators spearheaded or joined in efforts to rein in the president's authority on tariffs.