Santorum lost Wisconsin because of Ryan and Johnson, two popular and influential politicians, endorsing Mittens at the last minute.
Santorum lost WI for the same reason he lost all the upper Midwest rust belt states in the primaries.
You forgot Scott Walker was elected?
You forgot Russ Feingold was tossed?
Perhaps you did not study the 2010 election results very well, if at all.
WI, OH, MI, all had wild swings to the red category including governors, state legislatures down to dog catchers.
Santorum’s love of unions and big gubmint fiscal liberalism did not fare well in the upper Midwest.
That rust belt - where Santorum is against right-to-work and pro union, his senate votes say enough.
Enough is enough.