Support WBURImpeachment Managers Argue Trump Is 'Singularly Responsible' For Capitol AttackPlay04:02Download AudioRyan LucasNina TotenbergFebruary 02, 2021 ShareIn a pre-trial brief released on Tuesday, House impeachment managers argue former President Donald Trump whipped a crowd of supporters into a "frenzy" on Jan. 6 and incited the ensuing riot at the U.S. Capitol. (Getty Images)