Harry Enten thinks the state is Romney's make-or-break moment:
[I]f Romney were to lose Michigan, it is very difficult to see how he can accumulate a majority of delegates … And if Santorum does well in [poorer Michigan] districts, he could transfer that support to the other rust belt states that look a lot like them. The most important of these rust belt states is Ohio, which votes on 7 March. Michigan has somewhat fewer born-again Christians and evangelicals than Ohio (46%) did in the 2008 Republican primary. It had a nearly equal percentage of those making greater than $200,000 to Ohio's (5%). If Rick Santorum can win in both Michigan and Ohio, I can begin to see how he could conceivably put together enough delegates to reach a majority. He seems to be polling well enough in the south (leading in Tennessee, for example) to win the nomination – even if he loses in states like New York, New Jersey and California (though a recent poll there put him in a close second).
The Dish 