It should be easy since he can take plenty of the credit for Chicago. He might not have been Mayor, but I'm positive he helped steer the city into it's role model status of how strict gun control works.
Red States will fight it tooth and nail, but BHO knows how to get around and manipulate these things (think federal funding for seat belt laws, MLK Holiday). Won't happen in his term, but give it another 10-12 years.
china is in as bad of a position as we are, economically speaking. who do you think owns all our debt? who do you think is their biggest consumer?
what does that mean in our individual and mutual crisis? i don't know. both are living on borrowed (literally) time. neither have yet to see the other shoe drop, but its coming.
would the chinese invade? ehhhhhh.. i really find it kind of doubtful. thats not to say that they have decent sway over the US. US and China have a mutually symbiotic (and parasitic) relationship.