Democrats set to take historic step of impeaching Trump

House Democrats are poised to take the historic step of impeaching President Trump on Wednesday, marking what will be the most partisan vote to remove a sitting president since the country's founding.

The highly divisive vote — packed into the very last week of the legislative year — is sure to exacerbate tensions in Washington and around the country heading into a crucial election year, when echoes of impeachment could play an outsize role up and down the ballot.

The Democrats’ decision to bring impeachment to the floor caps months...