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Democrats draw a line in the sand for congressional Republicans. Federal authorities issue warnings to state capitols. And President-Elect Biden ponders how to roll out vaccines more quickly.

House Democrats declare that they will try to remove President Trump from office -- unless Vice President Mike Pence beats them to it. After years of refusing to silence President Trump, social media companies suddenly ban him from their platforms. And people spotted inside the Capitol are being arrested across the country.

House Democrats declare that they will try to remove President Trump from office -- unless Vice President Mike Pence beats them to it. After years of refusing to silence President Trump, social media companies suddenly ban him from their platforms. And people spotted inside the Capitol are being arrested across the country.

A shaken GOP moves against President Trump. Lawmakers demand the resignation of the Capitol Police chief. And social media platforms cancel the sitting US president.

A shaken GOP moves against President Trump. Lawmakers demand the resignation of the Capitol Police chief. And social media platforms cancel the sitting US president.

In an unprecedented siege, a group supporting President Trump temporarily takes control of the US Capitol. In a special edition of "Start Here," ABC reporters describe how it happened, what it means...and who's responsible.

In an unprecedented siege, a group supporting President Trump temporarily takes control of the US Capitol. In a special edition of "Start Here," ABC reporters describe how it happened, what it means...and who's responsible.

With a win for Raphael Warnock, Democrats find themselves one seat away from taking back the Senate. President Trump expects Vice President Mike Pence to subvert the presidential election results today in Washington. And Wisconsin prosecutors announce they will not press charges against the police officer who shot Jacob Blake.

With a win for Raphael Warnock, Democrats find themselves one seat away from taking back the Senate. President Trump expects Vice President Mike Pence to subvert the presidential election results today in Washington. And Wisconsin prosecutors announce they will not press charges against the police officer who shot Jacob Blake.

Georgia voters decide the final two seats in the United States Senate. The UK locks down again as coronavirus cases rise. And Google employees declare the formation of a tech workers' union.