asking for campaign donations with this e-mail saying, if you believe as i do that my brother kept this country safe and strong after those horrific attacks, then i need you to donate $5 and fight back against donald trump. well, jeb bush's campaign aides knew his brother's legacy over the iraq war would be a challenge. >> i can hear you. >> 9/11 was something team bush never dreamed would be an issue. and they're happy to relitigate. >> next week mr. trump is probably going to say fdr was around when japan attacked pearl harbor. it's what you do after that matters. and that's the sign of leadership. >> trump is not backing down. >> i'm not blaming george bush, but i don't want jeb bush to say my brother kept us safe because september 11th was one of the worst days in the history of this country. >> this afternoon trump tweeted a link to a three-year-old "new york times" story about the infamous classified presidential daily brief that george w. bush