The outcome is slightly uncertain because Republicans, who hold a 53-47 majority, face united Democratic opposition and the defection of at least two of their members. If the Senate approves the bill,

A marathon vote series continued into the wee hours Tuesday on President Trump's massive tax bill as Republicans worked to pass the centerpiece legislation of Mr. Trump's second-term agenda.The House narrowly passed the bill last month and Senate Republicans have been working to put their mark on the legislation,

The Republican-controlled Senate held a marathon voting session Monday on President Donald Trump’s massive tax cut and spending bill.