If it wasn't for the fact that I think he will truly help push through mandatory gun registration and put hardcore liberals on the court, neither of which is reversible once done, I would say that he would be a fine example of democrat incompetence and that, if he was elected, it would be like choking the liberals with everything they thought they wanted, until they realize just how awful it is in reality.
As it is, though, we can't afford the damage he would do, especially to the second amendment.
I think it's worse than that.
If an Obama admin and a Democrat controlled Congress makes any real push for gun control, in the Post-Heller era, they're going to have to use every creative end-run tactic in the book to get around it. And that's going to set up all sorts of dangerous precedents for Constitutional problems, fiat governance, and separation of powers issues that will be with us in all sorts of other areas beyond the erosion of RKBA.
OTOH, the radioactivity of the gun issue, the Heller decision, and (presumed) Democrat supremacy in both houses and the white house, could just gut the gun issue as a needed wedge issue, since there's no need for wedging when you have control.
And as to what the impact of an Obama Presidency or loss would have on the "race problem" in the U.S. I think it's all been said. It's complicated and I don't know what exactly will happen.
- Obama loses. Riots yes/no? Some final disillusionment. "It was rigged, the man kept us down again" type of sentiment?
- Obama wins. He's hemmed in by the realties of office and politics. Nothing changes. Disillusionment in "President Oreo"?
- Obama wins. Total liberal orgy of new social spending. And just like all the other decades of social spending, nothing changes, or it actually makes things worse for them. And it weakens the American economy, hurting them further. Do they care? Yes/no? Or is it okay, since they seem to tolerate their current crop of worthless "civil rights leaders", and having "their guy" as POTUS, who does as little for them as Jesse and ilk have is status-quo?
- Obama wins. It causes the race debate to end, like these minority leaders fear. Then what? Poor minorities start the real crawl to responsibility/stability that's needed to truly improve their lot? Does the economic damage, and welfare dependency of a liberal administration short-circuit, and eat that up, just like LBJ's "great society" derailed the civil rights movement?
I dunno. Despite our desire to pigeon hole everything, as usual in real life, I think it'll be some muddled combination of "all of the above".