Sens. John McCain (R-Ariz.) and Barack Obama (D-Ill.) have agreed to hold three presidential debates and one vice presidential debate, the campaigns announced today in a joint statement.

The first debate will be Sept. 26 at the University of Mississippi and will focus on national security. It will be moderated by Jim Lehrer of PBS.

The second, covering domestic and economic policy, will be Oct. 7 at Belmont University in Nashville and be moderated by “Meet the Press” host and former NBC anchor Tom Brokaw.

The final debate, moderated by Bob Schieffer of CBS, will be staged Oct. 15 and will also focus on domestic and economic policy. It will be held at Hofstra University in Hempstead, N.Y.

The vice presidential debate will be on Oct. 2 at Washington University in St. Louis and will be moderated by Gwen Ifill of PBS. All four debates will begin at 9 p.m. Eastern time and will last for 90 minutes.