A marathon voting session on President Donald Trump’s sweeping domestic policy bill is underway in the Senate and has stretched overnight into the early hours of Tuesday morning after a weekend of negotiations and delays.

The Senate is slogging through a tense overnight session that has dragged into Tuesday, with Republican leaders buying time as they search for ways to secure support for President Donald Trump's big bill of tax breaks and spending cuts while fending off proposed amendments, mostly from Democrats trying to defeat the package.