The US House of Representatives has approved a resolution calling on Vice President Mike Pence to invoke the 25th Amendment of the Constitution to remove President Donald Trump from power.
Criticism is mounting against Trump over his role in relation to the storming of the Capitol by his supporters last Wednesday.
The Democratic-controlled House passed the resolution on Tuesday with a majority in favor. It said the president is now unable to successfully discharge the duties of his office.
But earlier on Tuesday, Pence sent a letter to House Speaker Nancy Pelosi saying he will not yield to such a request. He said, "Invoking the 25th Amendment in such a manner would set a terrible precedent."
With Pence unlikely to act as requested, attention is now shifting to another resolution to impeach the president.
A vote on the impeachment resolution is expected at the House on Wednesday. If approved, the process would then move to the Senate, which would hold a trial. A two-thirds majority is required to convict and remove the president.
The New York Times reported that Senate Majority Leader Mitch McConnell, a Republican, has told associates that he believes Trump committed impeachable offenses.
Four House Republicans have indicated that they will vote for impeachment. Some media outlets are saying more Republicans could follow.
In an unusual development, with only about a week remaining of Trump's term, calls for his impeachment are intensifying.