Tennessee Sen. Bob Corker has become the only Republican senator to say he will vote against his party's $1.4 trillion tax bill.
His decision won't affect the measure's fate. GOP leaders have already said they have enough votes to push the legislation through the Senate in a vote they hope will come later Friday.
Corker's decision is not a surprise. He had expressed concerns that the measure would add more red ink to the government's $20 trillion in accumulated debt. He said Friday he doesn't want to burden future generations.
Corker has broken openly with President Donald Trump, questioning his stability and warning he might cause World War III.
Corker says he told Trump of his decision, and isn't ruling out backing a compromise House-Senate tax bill.
First Republican Senator comes out against tax bill