The bill is deeply unpopular - with nearly 2-to-1 opposition, according to a Washington Post-Ipsos poll conducted in June.

US President Donald Trump is to sign his landmark policy bill into law, a day after it was narrowly passed by Congress. The signing event at the White House on Friday afternoon, coinciding with 4 July celebrations, enacts key parts of the Trump agenda including tax cuts, spending boosts for defence and the immigration crackdown.

The legislation, which extends tax cuts and funds border and defense programs, would increase the national debt by close to $4 trillion over the next decade.