Senate Republican leaders continue to scrounge for votes to pass Donald Trump’s $3.3 trillion tax and spending bill as lingering intraparty fights threaten to upend the legislative centerpiece of the president’s domestic agenda.

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 $3.3 trillion legislation survived a brief GOP revolt over the weekend to allow the Senate to move forward with debate on the measure, but its final passage is far from certain.