text:  Party unity was the primary theme Tuesday night at the Republican National Convention in Milwaukee. As NPR's Ron Elving reports, former President Donald Trump watched as a parade of former campaign rivals sang his praises. He has a huge Cheshire Cat smile. His satisfaction seems to be quite complete. And why not? Because what he is reviewing is a kind of parade. It's a parade of, as you said, all his former rivals, all kinds of people from the party who had been, among other things,