US president Donald Trump begins his first full day in office on Tuesday, riding a wave of executive orders signed just hours after his inauguration on everything from immigration to the environment and culture wars.

After the pomp of his inauguration ceremony and stunning array of executive orders, the president’s Tuesday begins with a more solemn event: a prayer service at the National Cathedral.

Trump, 78, last visited the neo-Gothic church in the US capital in early January for the funeral of late president Jimmy Carter.

Trump signed various orders aimed at reshaping how the United States manages immigration and citizenship.

One declared a national emergency at the southern border.

Trump also promised a mass deportation operation involving the military, which he says will target those he called ‘criminal aliens.’

In the Oval Office, Trump signed an order revoking birthright citizenship.

But automatic US citizenship to people born in the country is enshrined in the Constitution, and Trump’s action is certain to face a legal challenge.

Trump signed pardons for more than 1,500 people charged in the January 6, 2021 attack on the Capitol by his supporters trying to overturn the 2020 election.

He again referred to those who were convicted or pleaded guilty over the riots as ‘hostages.’

Trump repealed various executive orders promoting diversity programmes and LGBTQ equality, in line with his promised attack on ‘woke’ culture.

He overturned decrees promoting diversity and equality in the government, businesses and healthcare, as well as the rights of LGBTQ Americans.

Trump said that moving forward the US government will only recognise ‘two genders, male and female.’

The president immediately withdrew the United States from the Paris climate accord, repeating an action he took during his first term.

The order extends Trump’s defiant rejection of global efforts to combat planetary warming as catastrophic weather events intensify worldwide.

It would take a year to leave the agreement after submitting a formal notice to the United Nations framework that underpins global climate negotiations.

Trump signed an order declaring a ‘national energy emergency’ aimed at significantly expanding drilling in the world’s top oil and gas producer.

‘We will drill, baby, drill,’ Trump said in his inaugural address.

Another order requires federal workers to return to the office full-time, with Trump seeking to undo most of the work-from-home allowances that flourished during the Covid-19 pandemic.

Trump signed an order for the United States to exit the World Health Organisation, insisting Washington was unfairly paying more than China into the UN body.

The president ordered a 75-day pause on enforcing a law that would effectively ban TikTok.

His action delayed implementation of an act that came into effect this week, prohibiting the distribution and updating of TikTok in the United States.

Trump has said the app’s Chinese parent company must agree to sell a 50 per cent share to the United States.

Trump revoked sanctions against violent Israeli settlers in the occupied West Bank accused of abuses against Palestinians, undoing an unprecedented action taken by Joe Biden’s administration.

Undoing another one of Biden’s more recent moves, Trump reversed the removal of Cuba from a blacklist of state sponsors of terrorism.

Biden had removed Cuba from the list only days earlier as part of a deal to free prisoners.

The Republican said in a speech after taking the oath at the Capitol — in a ceremony held indoors due to freezing weather — that ‘America’s decline is over’ after four years of Democrat Joe Biden’s presidency, pledging ‘the golden age of America begins right now.’

Biden, 82, watched stony-faced during the inauguration ceremony as his political nemesis read the last rites over his single term in office.

But after the pomp and ceremony, it was the showman Trump of his first term — along with the sometimes strongman-style rhetoric — who was on display later in the day.

‘Could you imagine Biden doing this? I don’t think so,’ Trump told a cheering crowd at a Washington sports arena as he threw them the pens he had used to sign a first round of orders.

Trump and First Lady Melania Trump attended several inaugural balls, beginning with the ‘Commander-in-Chief’ event with US service members.

‘Instead of worrying about political agendas, you don’t have to worry about that at all,’ Trump told the crowd in a brief speech.

‘It’s only one focus, defeating America’s enemies. We’re not going to be defeated. We’re not going to be humiliated. We’re only going to win, win, win!’

Trump is making history — as both the oldest president ever to take office and as the first felon, after a conviction related to paying a porn star hush money during his first presidential run.

He is also just the second president in US history to return to power after being voted out, after Grover Cleveland in 1893.