The House moved on two fronts on Sunday to force President Trump from office, escalating pressure on the vice president to strip him of power and committing to quickly begin impeachment proceedings against him for inciting a mob that violently attacked the seat of American government.

In a letter to colleagues, Speaker Nancy Pelosi said the House would move forward on Monday with a nonbinding resolution calling on Vice President Mike Pence to invoke the 25th Amendment, and wrest the powers of the presidency from Mr. Trump. She called on Mr. Pence to respond “within 24 hours.”

Next, Ms. Pelosi said, the House would bring an impeachment case to the floor. Though she did not specify how quickly it would move, leading Democrats have suggested they could press forward on a remarkably quick timetable, charging Mr. Trump with “high crimes and misdemeanors” by midweek.

“In protecting our Constitution and our democracy, we will act with urgency, because this president represents an imminent threat to both,” she wrote. “As the days go by, the horror of the ongoing assault on our democracy perpetrated by this president is intensified and so is the immediate need for action.”

— Nicholas Fandos The New York Times