Amid signs of Republican unease over the prolonged partial government shutdown, congressional leaders planned to meet Friday with President Trump, after House Democrats muscled through legislation to fund the government but not his border wall.
"I can do it if I want", the US president said when asked about the matter at a press conference outside the White House on Friday afternoon.
Mr Trump has said he will reject any measure that does not provide funding for his proposed US-Mexico border wall.
President Trump on Friday responded to renewed impeachment talk by some Democratic members of the new Congress with a two-part defense: tweeting that his success in office is the only reason Democrats want to get rid of him, and by the same token, he has done too good a job to be removed from office.
Mr Trump initially gave a positive account of the meeting, describing it as "very productive".
President Donald Trump pushed back on Friday, saying they're only acting because they know they can't win the White House in 2020.
The House passed a bill Thursday to reopen shuttered federal government agencies.
Trump is withholding his support for a Bill that would fully fund the government until he secures money for the wall. "I don't call it a shutdown".
"We have a national crisis at our border".
Analysts said that this would leave him open to legal challenges and might be possible only on government land, amounting to about 115 miles, or 5 per cent, of the border.
As Dick Durbin, the second-ranking Democrat in the Senate, told me on Thursday, there's "no end in sight" for the shutdown.
She said that was in part a "generational" difference, but also called out Trump for language he has used.
Republican Senate leader Mitch McConnell dismissed the move as "political theatre" and said the Senate would not deal with legislation likely to be vetoed by the president.
But Trump hit back saying the Democrats wanted impeachment because they know they can not win the White House in 2020.
The fight over the wall is setting the stage for what could be a tumultuous final two years in office for Trump faced with a hostile Democratic-controlled House equipped with investigative powers.
Barring that, however, the shutdown could last "months or even years", though Trump said he hopes it doesn't continue more than "a few more days".
Susan Collins, the Republican senator for ME, said "it would be great" for the Democrats' spending bills to be adopted, adding: "At least we'd be getting those workers back to work".
Before Friday, Trump had mentioned impeachment in his tweets only a handful of times, about a half-dozen - and two of those were from 2014 and directed at President Obama.
"We talked about (impeachment) today", Trump said. Republicans still hold the majority in the Senate.
Adding to national unease about the shutdown are economic jitters as analysts warn of the risks of closures that are disrupting government operations across multiple departments and agencies at a time of other uncertainties in the stock market and foreign trade. Several Republicans crossed over to join them. Polls show a majority of Americans oppose the border wall, although Republicans strongly support it.