 He's now vice presidential nominee, J.D. Vance, and he serves at the pleasure of President Trump. And when they are elected in the White House, he will serve at the pleasure of President Trump. It's President Trump who's the leader of this party. Caroline Sunshine is deputy communications director for the Trump campaign. Thanks very much. Thank you for having me. Republicans in Wisconsin are counting on their home state GOP convention to give them a boost. They've spent months building a ground game they hope will win the White House. Here's NPR's political reporter, Jimena Bustillo.