Donald Trump pledged to rescue America from what he described as years of betrayal and decline in his inaugural address on Monday, prioritizing a crackdown on illegal immigration and portraying himself as a national savior chosen by God.

"First, I will declare a national emergency at our southern border," he said. "All illegal entry will be immediately halted and we will begin the process of returning millions and millions of criminal aliens back to the places from which they came."

The speech echoed many of the themes he sounded at his first inauguration in 2017 when he spoke darkly of the "American carnage" of crime and job loss that he said had ravaged the country.

Trump, 78, took the oath of office to "preserve, protect and defend" the U.S. Constitution at 12:01 p.m. ET (1701 GMT) inside the U.S. Capitol, administered by Chief Justice John Roberts. His vice president, JD Vance, was sworn in just before him.

Trump will be the first felon to occupy the White House after a New York jury found him guilty of falsifying business records to cover up hush money paid to a porn star.

Trump intends to sign a raft of executive actions in his first hours as president, incoming White House officials said on Monday, including 10 focused on border security and immigration, his top priority.

In addition to declaring an emergency, the president will send armed troops there and resume a policy forcing asylum seekers to wait in Mexico for their U.S. court dates, officials told reporters.

He will also seek to end so-called birthright citizenship for U.S.-born children whose parents lack legal status, a move some legal scholars have said would be unconstitutional.

The inauguration completes a triumphant comeback for a political disruptor who survived two impeachment trials, a felony conviction, two assassination attempts and an indictment for attempting to overturn his 2020 election loss.

"The journey to reclaim our republic has not been an easy one, that I can tell you," Trump said, before referring to the assassin's bullet that grazed his ear in July. "I was saved by God to make America great again."

The ceremony was moved inside the Capitol due to the cold, four years after a mob of Trump supporters breached the building, a symbol of American democracy, in an unsuccessful effort to forestall Trump's loss to Democrat Joe Biden, 82.

Biden and outgoing Vice President Kamala Harris, who lost to Trump in November, were on hand inside the Capitol's Rotunda, along with former Presidents Barack Obama, George W. Bush and Bill Clinton. Former Secretary of State Hillary Clinton, who lost to Trump in 2016, arrived with her husband Bill, but Obama's wife, Michelle, chose not to attend.

Numerous tech executives who have sought to curry favor with the incoming administration - including the three richest men in the world, Tesla and SpaceX CEO Elon Musk, Amazon CEO Jeff Bezos and Meta CEO Mark Zuckerberg - had prominent seats on stage, next to cabinet nominees and members of Trump's family.

Trump, the first U.S. president since the 19th century to win a second term after losing the White House, has said he would pardon "on Day One" many of the more than 1,500 people charged in connection with the Jan. 6, 2021, attack. He skipped Biden's inauguration and has continued to claim falsely that the 2020 election he lost to Biden was rigged.

Biden, in one of his last official acts, pardoned several people whom Trump has targeted for retaliation, including former White House chief medical adviser Anthony Fauci, former Republican U.S. Representative Liz Cheney and former chairman of the Joint Chiefs of Staff General Mark Milley.

Trump will restore the federal death penalty, which Biden had suspended, and require that official U.S. documents such as passports reflect citizens' gender as assigned at birth, incoming administration officials told reporters.

They said he will also sign an order ending diversity, equity and inclusion initiatives in the federal government on Monday, which is also Martin Luther King Jr. Day, a national holiday in memory of America's most famous civil rights leader.

But Trump will not immediately impose new tariffs on Monday, instead directing federal agencies to evaluate trade relationships with Canada, China and Mexico, a Trump official said, an unexpected development that unleashed a broad slide in the U.S. dollar and a rally in global stock markets on a day when U.S. financial markets are closed.

Some of the executive orders are likely to face legal challenges.

Even as he prepared to retake office, Trump continued to expand his business ventures, raising billions in market value by launching a "meme coin" crypto token over the weekend that prompted ethical and regulatory questions.

Earlier Trump and incoming first lady Melania Trump arrived at the White House, where Biden and outgoing first lady Jill Biden greeted them with handshakes.
"Welcome home," Biden said.