 Matt Piper is at the convention in Milwaukee. The highlight of the night at day one of the RNC, Donald Trump entering the room. Welcome the next president of the United States, Donald J. Trump. It was the first time he's been seen since being wounded in an assassination attempt over the weekend. He waved to the crowd, mouthed thank you, and sat for about an hour listening to people take to the stage. One of them, Teamsters Union President Sean O'Brien.