Bush said troops who lost their lives for Bergdahl "didn't get the same attention."
Jim Talent served on the Senate Armed Services Committee before losing in 2006.
Eric Holcomb is a former Indiana GOP chairman.
The GOP dissenters included hard-line conservatives and centrists.
Former Sen. Kay Bailey Hutchison is endorsing Jeb Bush for president.
Ron Johnson, a top Democratic target, says student loans are too easy to get.
Leadership Matters for America hired Upstream Communications to manage online strategies.
The governor called for a candidate "who wants to do something, not just be somebody."
A new survey highlights the challenges Rubio faces in taking on his former mentor.