U.S. President-elect Donald Trump returned triumphantly to Washington on Wednesday, pledging a smooth transition of power in January as he met for two hours at the White House with his longtime political rival, President Joe Biden.

"It was a substantive meeting," White House spokeswoman Karine Jean-Pierre told reporters. "They discussed important national security and domestic policy issues facing the nation and the world."

Biden invited Trump for the traditional visit — a show of the coming Jan. 20 peaceful transfer of power in American democracy between the current U.S. leader and the incoming chief executive. It was Trump’s first visit to the White House since his first presidential term ended in January 2021.

The two men sat in front of a roaring fireplace in the Oval Office ahead of their private talks and traded niceties in a peaceful tableau.

“I'm looking forward to having a smooth transition and we're looking forward to talking about some of that today,” Biden said.

“Thank you very much,” Trump replied. “Politics is tough and in many cases it's not a very nice world. It is a nice world today and I appreciate very much a transition so smooth — it will be as smooth as it can get — and I very much appreciate that, Joe. Thank you.”

“You're welcome,” Biden responded.

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First lady Jill Biden joined her husband in greeting the president-elect upon his arrival at the White House. The White House said she gave Trump a handwritten letter of congratulations for his wife, Melania, and expressed her team’s readiness to assist with the transition.

The former first lady, who lived in the White House from 2017 to 2021 during her husband’s first presidency, did not accompany him to Washington and has not indicated whether she plans to move into the White House again when he takes office.

Biden, a Democrat, had sought to defeat Trump, a Republican, for a second time in the Nov. 5 election, but ended his campaign in July after faltering badly in a debate against Trump. Biden quickly endorsed Vice President Kamala Harris to succeed him, but Trump swept through seven political battleground states in the election and easily defeated her.

When Biden defeated Trump in 2020, Trump offered no White House invitation to meet him ahead of the inauguration and left Washington two hours before Biden’s swearing-in on the steps of the U.S. Capitol.

Trump, who to this day claims falsely that he was cheated out of winning the 2020 election by vote fraud, was the first president to not witness his successor’s inauguration since Andrew Johnson skipped the swearing-in of Ulysses S. Grant in 1869. Biden has said he plans to attend Trump’s inauguration.

| President-elect Donald Trump speaks as he arrives for a meeting with the House Republican conference, in Washington, Nov. 13, 2024

Trump also met with Republican lawmakers in the House of Representatives. Republicans hold a narrow majority in the chamber in the current Congress and are nearing a slight majority control in the Congress set to be sworn in Jan. 3, but the outcome of more than a dozen House elections remains uncertain.

Trump has moved quickly to fill his nascent administration with Republican officials who have been the most politically loyal to him in the four years he has been out of office.

In his latest announcements Wednesday, Trump named Florida Senator Marco Rubio as secretary of state, the country’s top diplomat; Florida Representative Matt Gaetz as attorney general, the top law enforcement position in the government, and Tulsi Gabbard, a former Hawaii Democratic congresswoman turned Republican advocate for the president-elect, as director of national intelligence.

On Tuesday, Trump named Pete Hegseth, a Fox News host and a veteran of the wars in Iraq and Afghanistan, to be his next defense secretary.

The choice of Hegseth was outside the norm of those usually named as the Pentagon leader. But he was a vocal supporter of Trump during his first term, embracing his “America First” agenda of trying to withdraw U.S. troops from abroad and often taking up the cause of combat veterans accused of war crimes.

Trump has also announced South Dakota Governor Kristi Noem as his choice for Homeland Security chief and picked John Ratcliffe as the director of the Central Intelligence Agency.

Both Rubio and Noem were on Trump’s short list of possible vice presidential running mates several months ago. While Trump later picked first-term Ohio Senator JD Vance, now the vice president-elect, to join him on the Republican national ticket, both Rubio and Noem remained Trump stalwarts as he won the election.

Ratcliffe was the nation’s sixth director of national intelligence, serving for the last eight months of the Trump administration after a rocky confirmation process.

| Elon Musk, left, sits with Kelly Johnson, wife of House Speaker Mike Johnson, as President-elect Donald Trump speaks at a meeting of the House Republican conference, in Washington, Nov. 13, 2024

Trump also announced that billionaire businessman Elon Musk and entrepreneur and former Republican presidential candidate Vivek Ramaswamy will lead what Trump called the Department of Government Efficiency. The announcement said they would provide advice and guidance to “drive large-scale structural reform” of the federal government.

The acronym for the new agency, DOGE, is a nod to Musk’s favorite cryptocurrency, dogecoin.

Other notable picks by Trump include William McGinley as White House counsel, Florida congressman Michael Waltz as national security adviser and Thomas Homan, Trump’s former acting immigration chief, to be “border czar” to head efforts to deport undocumented migrants, possibly millions of them, who are living in the United States.