McCain's big moment. Broadcast: Midday, 09/04/2008, 7:00 p.m. Before the Republican National Convention can come to a close, Sen. John McCain, R-Ariz., must accept his party's nomination. Also speaking tonight will be Minnesota Gov. Tim Pawlenty, former Pennsylvania Gov. Tom Ridge, and Cindy McCain. As part of our special convention coverage, Gary Eichten broadcasts live from the Xcel Energy Center, the site of the Republican National Convention. Guests: Todd Rapp: political analyst, a Democrat. Tom Horner: political analyst, a Republican.