As polls close all eyes are on Michigan

Michigan is pretty close to a "must win" state for Mitt Romney.  It is his native state and one where his father was a very popular governor.  If he loses there in the wake of his weak showings in the last four primary/caucus contests it would be hugely embarrassing.  Further it would almost certainly call into question his status as the frontrunner and the nominee presumptive of the Republican Party.  In short, if Romney loses Michigan it could throw the entire primary season into chaos.

The most recent polls taken before voting began showed Romney with a very slight lead over his rival Rick Santorum.  But that lead is well within the margin of error and from a statistical perspective amounts to a tie.