The first debate, on foreign policy and national security, will be held Sept. 26 at the University of Mississippi and moderated by Jim Lehrer, host of “The NewsHour” on PBS.

The second one will be a town hall debate moderated by NBC’s Tom Brokaw on Oct. 7 at Belmont University in Nashville. All the questions will come from the audience or the Internet.

The third debate, on domestic and economic policy, will be held Oct. 15 at Hofstra University in New York. CBS’ Bob Schieffer will moderate that one.

The vice presidential debate will be moderated by PBS journalist Gwen Ifill and held Oct. 2 at Washington University in St. Louis. The debate formate won’t be resolved until the vice presidential nominees are chosen.