Incautious strawman arguments like this have a way of collapsing. Romney has shown an appreciation of the difference between federal and state systems vis a vis Obamacare/Romneycare. At the same time, he wouldn't want to see any of Massachusetts' or other states' liberalism get torpedoed, which means he couldn't be counted on to support things like DOMA (or whatever's left of it come November 2012) or anything which elbows into states' abortion policies.
Yup. Trust is a very personal thing. People have a lifetime of views and human nature is predictable. Romney’s fatal handicap is he comes across as someone who is not believable. And if I don’t believe someone, it doesn’t matter what they have to tell me.
He's running for the highest office of the land, which is at the federal level. If he wants to be a gun grabbing socialist, maybe he should run for governor of some liberal state again. I don't think it's so much to ask that our possible Republican nominee have actual conservative principles.
I could imagine a wimp like Romney as President with a liberal house & senate. They'd get him to go along with ANY liberal position with very little pressure. He stands for nothing.