Why is he a worry to begin with? Because so called conservatives arent trustworthy to stand for jack squat. they proved it.
1. I know a lot of people that support Romney. Bush, not so much.
2. Romney was far ahead in the polls he was included in before he announced he was not running.
3. Romney is sharp, very competent, business-like, heavily experienced, and much more credible than any of the current establishment candidates. He is also good looking and will get a good bit of support from shallower republican women.
This is not a threat to dismiss.