Here is a scenario being put forward by an unnamed “top Republican.”
If Romney loses in Michigan, he’ll be too damaged to be a credible nominee.
Santorum is unacceptable. He would lose 35 states.
So there’s no alternative but for JEB BUSH to enter the late contests and pick up enough delegates to guarantee the brokered convention.
The top Republican also expressed some confidence that Romney would find a way to win in Michigan. (But he may not have seen the poll showing Romney down 18 in Ohio.)
I assume the top Republican says JEB and not MITCH because he’s the guy most likely to step up.
My own perception is that top Republicans are getting pretty fatalistic about the election.