Washington: Democrats in the House of Representatives have stepped up their bid to impeach Donald Trump in the waning days of his presidency, contending that he should be held accountable for the unprecedented mayhem by thousands of his supporters at the US Capitol.

Hundreds of pro-Trump followers stormed the Capitol and occupied the building for hours, ransacking offices, forcing an evacuation of lawmakers and interrupting their certification of the November presidential election. One woman in the mob was shot to death by police in a corridor, and one of several police officers injured in clashes with protesters died. Three more died of medical emergencies on the grounds during the tumult.

The move to impeach Trump gained momentum on Sunday with the House Democrats announcing to introduce the article of impeachment against the outgoing Republican president on Monday.

This comes hours after the House of Representatives Speaker Nancy Pelosi in a Dear Colleague letter to the Democratic members laid the ground rules for the move and gave an ultimatum to Vice President Mike Pence to invoke the 25th Amendment of the Constitution.

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