Senator Bob Corker asked fellow Republicans to step out of line with President Trump.
The Senator was fighting for a vote on his amendment to a defense bill which would give congress the ability to check presidential authority on international tariffs.
Corker, who will be retiring after this term, called on his party to vote despite fear of opposing President Trump.
"95 percent of the people on this side of the aisle support intellectually this amendment. I would bet that. I would bet higher than 95 percent. And a lot of them would vote for it if it came to a vote. But no no no. Gosh we, we might poke the bear, is the language I've been hearing in the hallways. We might poke the bear," said Corker.
"The president might get upset with us as United States Senators if we vote on the Corker amendment. So we're going to do everything we can to block it, to block it. If people don't like it they can vote up or down. People can vote up or down but no the United States Senate right now, on June the 12th, is becoming a body where well, we'll do what we can do. But my gosh if the president gets upset with us then we might not be in the majority and so let's don't do anything that might upset the president."
Republican leaders cited procedural problems with the amendment in addition to conflict with the president.
Corker announced he would find a work around for the procedural concerns, but it was voted down anyway.
