Donald Trump has secured his unique place in the history books, the first President in American history to be impeached twice. What that means in practical terms isn't clear. There'll be no Trump trial in the senate before Joe Biden moves into the White House but Democrats insist he will be held to account for the assault on the Capitol. Stephen Sackur speaks to the veteran lawyer Alan Dershowitz, part of the Trump defence team in impeachment 1. Will he get involved in the sequel and how will it play in a divided America?
