You could ask yourself what some Santorum supporters see in both he and Romney that his stumbling benefits Mitt.
For me, it's easy: they're both establishment creatures.
“Santorum voted for Sotomayor”
Big deal..25 GOP Senators voted for her, including notorious libs (/sarc/) like Thad Cochran and Orrin Hatch. She was elevated from the district court bench where she had been appointed by George Bush 41. There were no red flags about her. She was no conservative but there was nothing really radical about her at that point. She was confirmed 67-29.
Santorum’s vote didn’t change a thing.