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.

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.