The Senate version of President Donald Trump’s tax and spending measure would add nearly $3.3 trillion to US deficits over a decade, according to a new estimate from the nonpartisan Congressional Budget Office.

The Senate Republican tax bill speeding to passage includes the biggest reduction of funding for the federal safety net since at least the 1990s.

The Republican-controlled U.S. Senate narrowly advanced President Donald Trump's, sweeping tax-cut and spending bill on Saturday, during a marathon weekend session marked by political drama, division and lengthy delays as Democrats sought to slow the legislation's path to passage.