Who would benefit the most from a Bush vs. Romney stand-off?

[IceSpear]

You didn't ask this question, but Christie is clearly the huge loser (no pun intended) in this scenario. He might not even make it to Iowa if both Bush and Romney run. Other losers would be the "backup establishment candidates" such as Walker, Kasich, and Pence.

The winners are everybody else, the non establishments and Tea Partiers. Paul, Cruz, Carson, Huckabee, etc.

[IceSpear]

I think if Romney runs the primary narrative will be Romney vs. Bush. The other candidates will be more pushed aside.

The Tea Party probably won't be able to get their candidate, but they're not going to be irrelevant. And they're not fond of either Romney or Bush.