[On a McCain ad that compares Obama to the Anti-Christ)

The End Times, a New Testament reference to the period surrounding the return of Christ, were popularized in recent years by the "Left Behind" series of books that sold more than 63 million copies. The Rev. Tim LaHaye, co-author of the series, said in an interview that he recognized allusions to his work in the ad but comparisons between Sen. Obama and the antichrist are incorrect.

"The antichrist isn't going to be an American, so it can't possibly be Obama. The Bible makes it clear he will be from an obscure place, like Romania," the 82-year-old author said.