Speaker Nancy Pelosi has, meanwhile, announced that the House of Representatives will consider a resolution later on Monday to urge Vice President Pence to invoke the 25th Amendment in order to remove President Trump from office.
Democrats and Republicans alike have accused Trump of leading an insurrection against his own Capitol. David Cicilline of Rhode Island, Ted Lieu of California, Jamie Raskin of Maryland and Jerrold Nadler of NY, said Trump threatened "the integrity of the democratic system, interfered with the peaceful transition of power" and "betrayed" trust.
Furthermore, while they may only take a matter of days from Trump's presidency, they could also preclude him from running for public office in future.
A few Republicans have joined calls for Trump to resign, but the president has given no sign he's contemplating it.
"I think the president has disqualified himself from ever, certainly, serving in office again", Toomey said.
Donald Trump impeachment timeline: When will Trump be impeached? Trump is slated to cede office on January 20 when President-elect Joseph R. Biden is sworn in.
The document allows for a temporary or permanent transfer of power from the United States president to the vice president if the majority of Cabinet members certify to Congress that the president is unable to perform his duties.
According to the memo, the Senate, which is now in recess, will not reconvene for substantive business until 19 January, meaning that the upper chamber may start impeachment proceedings a day before President-elect Joe Biden is inaugurated at the earliest.
If Pence doesn't respond to the House's request to invoke the 25th Amendment, Pelosi has said she will bring the impeachment article to a vote.
"We will act with urgency because this president represents an imminent threat", Pelosi said in a letter late Sunday to colleagues emphasising the need for quick action.
On Monday, House Majority Leader Steny Hoyer, a Maryland Democrat, will introduce a resolution prepared by Raskin that calls on Pence to invoke the 25th Amendment, according to Pelosi.
The impeachment proceedings could stand a better chance of success this time around as the Democrats hold a majority within the house.
Minnesota Rep. Ilhan Omar, also a Democrat, was also planning to introduce two articles of impeachment against Trump on Monday.
In a phone call released by The Washington Post last week, Trump pressured Georgia Secretary of State Brad Raffensperger to "find 11,780 votes" needed to overturn President-elect Joe Biden's victory in the state. Judges across the country, including some nominated by Trump, repeatedly dismissed cases and Attorney General William Barr, a Trump ally, said there was no sign of any widespread fraud. He spoke at a rally of his supporters on the National Mall as Congress convened to certify the Electoral College vote and cement Biden's win.