Give Santorum a comfortable lead in both Michigan and Ohio. They also show that Gingrich is done everywhere but the South.

Santorum has big limits, as Pete has described, but they’re not the kind Romney can readily exploit.

Santorum and Romney are about even nationwide, and Romney still polls better against Obama. (Obama’s lead, meanwhile, seems to increase a little daily.)

But can Romney sustain losing to Santorum in MI and OH, while meanwhile conceivably running third in TN and GA?