 This is a special report from ABC News, the Republican National Convention. I'm Daria Albinger. The first session is underway and a vice presidential pick could be announced later today. ABC's Jim Ryan in Milwaukee. It's rare that a potential presidential nominee would show up on the first day of the convention, but Donald Trump's plane touched down here in Milwaukee Sunday. Given Saturday's attempt on Trump's life and the suspense over his VP pick, Arizona Delegate Michelle Alther says. There's going to be a lot more.