He had quotes from Romney on both sides of that issue, so whichever way Mitt responded, he was going to jump on him with his opposite
But Stephie was too ham-handed in the attempt, bringing up an issue of such stunning irrelevance Romney was unable to fathom why he would ask something so ridiculous, and so didn't jump on the bait.
It wasn’t about Romney; it was about Santorum. Steffy was using Romney to set up Santorum.
It was an, as the saying goes, EPIC FAIL.