 Jim, thank you. Tonight, former President Trump has arrived in Milwaukee ahead of tomorrow's start of the RNC. The former president ready to take the stage this week as the investigation into the assassination attempt on him is only beginning. President Biden saying tonight the motive remains unclear. The president calling for political violence to end, saying politics can never be a battlefield and, God forbid, a killing field. I'm Alex Stone. You've been listening to live coverage from ABC News.