Trump warns of "largest tax increase in history" if Senate fails to pass his comprehensive bill that includes tax cuts and border security while facing bipartisan resistance.

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.

Senate Republicans hope they are hours away from passing their massive tax and immigration bill. But the outcome is far from certain.