Welcome to Trail Guide, your daily blog on the 2016 presidential campaign. It's Sunday, Sept. 20, and this is what we're watching:
- Donald Trump offers his views on the controversy surrounding a supporter's statements about President Obama being a "Muslim"
- Polls: Carly Fiorina won debate, but Trump still leads GOP race, polls find
- Ohio Gov. John Kasich responds to "tip" comment about Latinos on NBC's "Meet the Press." The news was first reported by the The Times' Kurtis Lee while in Irvine last week
- Ben Carson, who is polling No.