US President-elect Donald Trump on Wednesday met President Joe Biden in the Oval Office of the White House to ensure a smooth transition of power, a hallmark of American democracy which took a break four years ago.

In the meeting, the two leaders assured the nation of a peaceful transition of power on January 20 next year.

Biden said, “welcome back” to Trump, and the two leaders shook hands.

He congratulated Trump on his victory and said he looked forward to a smooth transition.

"Well, Mr President-elect, Donald, congratulations... and I look forward to having a smooth transition. Welcome," Biden said.

“Politics is tough, and it’s, in many cases, not a very nice world, but it is a nice world today, and I appreciate it very much. The transition is so smooth, and it will be as smooth as it can get...," Trump said in his remarks.

The First Lady joined President Biden in greeting President-elect Trump upon his arrival at the White House. She gave Trump a handwritten letter of congratulations for Mrs Trump, which expressed her team’s readiness to assist with the transition.

White House Chief-of-Staff Jeff Zients and incoming White House Chief-of-Staff Susie Wiles also attended the meeting later.

Meanwhile, addressing Republican lawmakers during his meeting with them after returning to Washington for the first time since his election victory, Trump said, "It's nice to win." “I suspect I won’t be running again unless you do something,” he said.

The US Constitution prevents presidents from running for a third term.

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