In four days, Jeb Bush gave four different answers to questions about whether he would have handled Iraq the same way as his brother did, knowing what we know now.

Bush began with an answer Monday about what he would have done if he didn't know what we know now. By Thursday, he was saying that he would not have gone to Iraq. In between, multiple other Republican contenders were asked the same question, and answered that they would not have gone.

As Jon Stewart put it on "The Daily Show" Thursday, Bush's answer had "more sequels than 'Star Trek' and 'Madden Football.'"

Stewart also addressed the fact Bush isn't officially a candidate for president, despite setting up a PAC, a super PAC, a nonprofit, and advisory team, and has gone to events in Iowa, New Hampshire, and Nevada.