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.

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 initial procedural vote on the One Big Beautiful Bill Act was 51-49, offering a stark preview of the difficulties party leaders face in getting the measure passed into law.