former president george w. bush is stepping up in a new ad from the right to rise superpac. take a listen to that. >> i know jeb. i know his good heart and his strong backbone. jeb will unite our country. he knows how to bring the world together against terror. he knows when the tough measures must be taken. >> bush is in double digits according to the latest poll. but he is still in fifth place behind rubio and kassig, who candidates he would like to beat

let me play a clip of that for our viewers. >> the first job of the president is to protect america. our next president must be prepared to lead. i know jeb. i know his good heart, and his strong backbone. jeb will khomeini our country. he knows how to bring the world together against terror. >> so, tim. same question. why not use the former president in a more significant way before now? >> reporter: sure, look, i'd say just in the same way that barbara bush spoke to those kind of american values we've lost, what jeb's brother can speak to