Welcome to Trail Guide, your daily tour along the road to the White House. It's Thursday, Aug. 13, and this is what we're watching:
- The Iowa State Fair begins and presidential candidates are set to arrive and do some retail politics. Former Arkansas Gov. Mike Huckabee is scheduled to deliver his soapbox speech Thursday.
- Rick Perry, who recently stopped paything his staff, arrives in Anderson, S.C., for a town hall
- Donald Trump appeared on Fox News' "Hannity" — again — and talked poll numbers and more.