President Trump, speaking to reporters for the first time since his supporters stormed the US Capitol last week, decried House Democrats move to impeach him as "absolutely ridiculous".

The president said there was a "tremendous anger" over the move, which could happen as soon as Wednesday, called it a "continuation of the greatest witch hunt in the history of politics”, but added "I want no violence".

Trump spoke as he left the White House for a trip to the border wall in Alamo, Texas.

In his first remarks to reporters since Dec. 8, Trump did not answer a question about whether he would resign.

Trump would become the first U.S. president to be impeached twice if the House of Representatives votes in favor of impeachment on Wednesday.

With only eight days left in his one-term administration, Trump finds himself barred by social media, and now facing a second impeachment over claims that he instigated a riot against Congress on January 6.

(With input from agencies)