The Senate is holding a marathon amendment voting session Monday after Republicans advanced President Donald Trump's legislative agenda over the weekend. A final vote on the bill is not expected anytime soon.

Ron Johnson of Wisconsin -- a staunch deficit hawk has been critical of President Donald Trump's sweeping tax and immigration bill -- signaled Monday that he would vote for the bill when it comes to a vote late Monday night or early Tuesday.

Entering the final stretch of an arduous process, the Republican-controlled Senate began voting Monday on amendments to President Donald Trump's massive tax cut and spending bill, with the goal of passing it later in the day.