Most assuredly. Jeb might as well grab any of those three and say "Here, vote for this RINO." If he really wanted to help out the cause, he could endorse someone like Hunter or Newt.
Guliani: too liberal socially and too many skeletons
McCain: too old and too unpredictable
Romney: "Clinton-esque" in his poll watching?
Newt: too many personal skeletons, too much hated, and too loose lipped
Where do we turn???