House Speaker Nancy Pelosi (D-Calif) said she on the day the U.S. Capitol was attacked would “punch then-President [**Donald Trump**\] out” if he decided to join his supporters in the insurrection, never-before-seen footage shows. Alexandra Pelosi — a filmmaker and the Speaker’s daughter — captured the moment for a documentary about the January 6 riot. Networks aired the clip on Thursday, a few hours after the select committee investigating the attack showed other moments during a hearing. In the video, a staff member informs the Speaker that Trump had been persuaded by the Secret Service to n…