 Walden is not a delegate, but he is one of thousands expected to be in Milwaukee for the convention this week. Trump's campaign and the Republican National Committee say the convention will carry on as planned. The event kicks off on Monday. Ximena Bustillo, NPR News, Milwaukee. Congressional Republicans are calling for a speedy investigation into last night's shooting. House Speaker Mike Johnson says he's planning to hold hearings to examine the security lapses at the event.