Instead of a prepared speech, Bush will sit for a Q&A with the conservative firebrand.
Her speech suggested how she might look to make her gender one theme of a possible campaign.
His budget address comes after a judge ruled he had illegally underfunded the system.
The annual CPAC will bring major speakers and immigration hard-liners to D.C.
Former Ark. governor will be wooing activists in S.C. and Tenn. instead ahead of 2016.
In New Hampshire, the 2016 hopeful says Obama's actions make it harder for reform.
The 2016 contender tweeted an old photo to mark his wedding anniversary.
The address highlights the 2016 GOP hopeful's focus on young voters and campaign technology.
"He refuses to be drawn into the sideshow," an email from his campaign reads.
Graham also said Obama is "failing miserably" to defend the U.S.