>> don't blame him or don't blame him, he was president. the world trade center came down during his reign. >> it's a delayed response to one of jeb bush's most passionate moments at cnn's debate last month. >> your brother's administration gave us barack obama because it was such a disaster that abraham lincoln couldn't have been elected. >> you know what, as it relates to my brother there's one thing i know for sure. he kept us safe. i don't know if you remember -- [ applause ] >> trump is now even suggesting he could have stopped the 9/11 hijackers from getting into the u.s. in the first place. >> i'm extremely tough on people coming into this country. i doubt that those people would have been in the country. >> for the record, the 9/11 commission said only two of the 19 hijackers overstayed their visas. but others gamed the immigration system. the commissioner also said the attack was a shock but should not have come as a surprise. still, jeb bush's campaign thinks trump's latest rant handed them a winning issue seizing on trump's comments even