Republican presidential candidate Jeb Bush transitioned from defense to offense on Sunday after criticism from rival Donald Trump that his brother, former President George W. Bush, carried some blame for the Sept. 11, 2001, attacks.
Trump, the flamboyant front-runner in the 15-candidate Republican field, once again provoked a tit-for-tat with Bush on Friday by saying his brother must share some of the blame for the attacks that occurred during his first year in office.
"Look, my brother responded to a crisis, and he did it as you would hope a president would do," Bush said on CNN's "State of the Union."