From Jean's great article:

Former Florida Gov. Jeb Bush’s campaign is furious with 2016 GOP frontrunner Donald Trump over Trump’s comments that the 9/11 terrorist attacks happened on Bush’s brother former President George W. Bush’s watch. But a review of the basic facts of the situation—and Jeb Bush’s own writings—reveals that even the Bushes admit that “leaky” immigration enforcement was a major driving factor in leading to the terrorist attacks.
Hey, Jeb!

Stick a fork in you. You're done.