Donald Trump has declared "America is back" in his first address to Congress since returning to power.

The 78-year-old US President delivered a 100-minute speech on Tuesday evening, the longest congressional address by any US president in history.

"America's momentum, spirit, pride, and confidence are back," Trump told lawmakers.

He wasted no time highlighting what he described as his administration's achievements, claiming they had accomplished more in just 43 days than most past administrations managed in four or eight years.

Trump told Congress 'America is back'

Donald Trump holds a copy of an executive order honoring Jocelyn Nungaray

"The American dream is surging bigger and better than ever before. It is unstoppable, and our country is on the verge of a comeback the likes of which the world has never witnessed," Trump declared.

Trump's entrance to the chamber was met with loud chants of "USA" from his supporters.

But protests began within minutes of his speech starting.

Democratic Representative Al Green was ordered to be ejected after refusing to stop heckling and shaking his walking stick at the President.

"You have no mandate," Green shouted at Trump before being removed from the chamber.

Green told NBC following the event that when Trump spoke it "triggered something" in him.

He said: "When he said he had a mandate, it triggered something. It really did. Because he doesn't have a mandate, and he doesn't have a mandate to cut health care from poor people."

Other Democrats silently held up placards with messages including "False", "Musk steals", "Protect Veterans" and "That's a lie!"

At one point, numerous Democrats yelled "January 6!" at Trump, in reference to his supporters' attack on the Capitol in 2021.

Some Democrats walked out well before Trump had finished speaking.