Welcome to Trail Guide, your daily tour along the road to the White House. It's Wednesday, Aug. 5, and this is what we're watching:
- A volley between Hillary Rodham Clinton and Jeb Bush over women's healthcare was a lesson in the speed of modern campaigning
- The Washington Post reports the FBI is looking into the security of Clinton's private email server
- President Obama will give lawmakers the hard sell on his Iran nuclear deal in a speech at American University
- Republican candidates are Ohio-bound.