Welcome to Trail Guide, your daily tour along the road to the White House. Here's what we're watching Sunday, July 26:
- Donald Trump leads in Iowa and New Hampshire, according to new NBC/Marist polls released Sunday
- Hillary Rodham Clintoncontinues her weekend trek through Iowa. On Saturday, Clinton addressed the controversy surrounding her private email address as secretary of State, saying she's "confident" she never sent or received information that was classified at the time
- OhioGov. John Kasich, whoannouncedhis candidacy for president last week, appears on NBC's "Meet the Press" where he'll discuss the Iran nuclear deal and threats posed by Islamic State extremists
- Sen.