Denver debate may contain gay marriage question: This week's presidential debate, the first of three, may be the first time Obama and Romney square off on gay issues. The 90-minute debate, which will be moderated by PBS NewsHour's Jim Lehrer, will air this Wednesday, Oct. 3, at 9:00 p.m. (EST). The vice presidential debate will air on Oct. 11, followed by the remaining 2 presidential debates on Oct. 16 and Oct. 22. For what to look for in the first debate, click the link below.