The bill will fund Trump's immigration crackdown, make his 2017 tax cuts permanent, and could knock millions of Americans off health insurance.

In a speech from the White House balcony facing the South Lawn, Trump thanked Republican lawmakers who helped usher the bill to his desk. He touted the tax cuts in the bill, brushing aside criticism of the impact to social programmes such as food assistance and Medicaid.

President Donald Trump signed his package of tax breaks and spending cuts into law Friday in front of Fourth of July picnickers after his cajoling produced almost unanimous Republican support in Congress for the domestic priority that could cement his second-term legacy.