 Night one of the Republican National Convention in Milwaukee underway, and already an eventful day as former President Trump has officially become the nominee, and he picked up the running mate. It's J.D. Vance, Ohio's J.D. Vance, first-term senator, also endorsed by the delegates. We'll get the latest from CBS in seconds. We'll go in-depth with the editor-in-chief at National Journal at 9.15. It's 9 o'clock. This is CBS News on the Hour, sponsored by O'Reilly Auto Parts.