President Joe Biden has arrived in Europe ahead of next week’s key UN climate summit, with his signature climate policy yet to pass through the US Congress.
The president’s $1.75 trillion Build Back Better social welfare package includes more than $500bn of spending on green policies.
Before leaving Washington, Mr Biden described the measures as historic.
But differences among Democrats mean it is unlikely to pass before the summit.
“It’s a framework that will create millions of jobs, grow the economy, invest in our nation and our people, turn the climate crisis into an opportunity,” Mr Biden said in a TV address from the White House.
The president heads for the COP26 global climate summit in Scotland on Sunday, but his first stop was the Vatican where he met the Pope.