"I can't imagine that being the only litmus test that I would want to put on a candidate," he said.
The significance here is implicit. As Massachusetts governor, Mitt Romney -- arguably the GOP presidential primary frontrunner -- signed off on the very same type of requirement that Republicans are attacking President Obama for pushing nation-wide. So while they're trying to undo his regulation, they also know they can't turn this into a black and white issue in the coming election. Because, of course, their own guy will have a hard time explaining away his own past views and actions.