Anyone's positions can evolve. And they can change when representing a different constituency. Note post 151. On this issue, I believe Rudy embraces his former position.
#151 was enlightening. He does believe in gun control....less in some areas than others. He's presenting it as a "states rights" issue.
As if freedom of the press were a state's rights issue. New Mexico doesn't need the same level of free speech as does Michigan because Michigan has "more rich people who can overcome the voice of the individual." (Just an example I dreamed up.)
I agree with you that positions can evolve. My question is, given that fact, what can be done to determine if it is a true evolution or a politically expedient one.