Since "town hall" debates were introduced 20 years ago, they've been a fixture in every presidential election season.
Here's what to expect:
• The audience will be made up of about 80 undecided voters, screened and selected by Gallup, the polling organization.
• Audience members will each submit questions in advance to moderator Candy Crowley, of CNN, and Ms. Crowley will choose which audience members to call on. Each candidate has two minutes to respond, and there will be an additional minute for Crowley to facilitate discussion. The audience member who asked the question is not permitted a follow-up.
• Each candidate will get two minutes for a closing statement.
Still, even with rules hashed out in detail, some controversy has arisen during the past week – and it's unclear, at this point, how much leeway Crowley has to press the candidates or to ask a follow-up question.
According to Time magazine's Mark Halperin, the agreement worked out between the two campaigns stipulates that Crowley has a very limited role that bars her from intervening in the debate beyond calling on the questioners and keeping the candidates to their two-minute time limit.
Crowley, on the other hand, apparently views her role differently and doesn't feel bound by the agreement hammered out by the campaigns and the Commission on Presidential Debates. On Oct. 5, speaking on CNN, Crowley said, "Once the table is kind of set by the town-hall questioner, there is then time for me to say, ‘Hey, wait a second, what about X, Y and Z?’ ”