Sen. John McCain and Barack Obama will both be at Rick Warren's Saddleback Church in California tonight for a question and answer session with the pastor.

Warren is calling this a "Civil Forum on the Presidency," where he has pledged to not ask "gotcha" questions. We'll see if that means a total absence of substantive issues that could show the great moral and ethical differences between the candidates (such as Abortion), or if Warren has questions that deal with critical issues that the candidates don't already have memorized answers for. He says both candidates will receive the exact same questions. Only Warren will question the candidates, one hour with each candidate appearing separately. The forum will be televised on CNN and Fox News Channel from 7-9 PM CDT.

At the candidates’ request, this two-hour event will be held in a non-debate format, and will be open to all media. Both candidates also requested that questions be posed exclusively by Warren rather than by a panel or members of the audience. Each candidate will converse separately with Warren for approximately an hour, beginning with Sen. Obama, as determined by a coin toss.

This historic forum will be the only joint event for the two, and the last public appearance for either candidate prior to the two-week hiatus during each party’s national convention.