 An excessive heat watch is posted for seven counties in far southwest Iowa from Sunday afternoon through Monday night. Forecasters say heat indices may reach 112 degrees. The chairman of the Iowa Republican Party is scheduled to deliver the speech that officially nominates Donald Trump for president. Jeff Kaufman says it'll be an honor to speak Monday afternoon at the GOP's national convention in Milwaukee. There's an energy in the room when you've got that many people gathered together for one cause.