Seriously, where do you come up with this stuff? Where did you hear anyone say "Obama is going to pursue gay marriage in his second term"? At the most, it was and has always been all about the supreme court.
You do know liberal supreme court justices tend to tell the states to "go fuck themselves" in favor of federal power.
Of course that doesnt apply to the right to bear arms, which is actually in the consitution.
Justices Souter, OConnor, and Kennedy will be surprised to learn theyre liberals.
Otherwise the states have only themselves to blame, they should be familiar with privacy rights case law and refrain from enacting legislation they know to be un-Constitutional.
Last, nowhere in the Constitution does it reference the right to self-defense, or the individual right to own a handgun.