Guns. It's going to be a long thread.
Given that rodentia are the most successful mammalian order on the planet, I have to respectfully disagree.
The 2nd amendment has no more chance of being repealed than the 1st. Hunting is far too popular, the NRA is far too well funded, organized and effective, and the Democrats are largely dropping the anti-gun issue, and wisely so, to face political reality and bolster their support for more pressing issues.
As a tree hugger, we wouldn't want a repeal, particularly of hunting weapons. Hunters (and fisherman) give by far more money to environmental causes (for habitat protection) than those who do not participate in those sports.
Besides, I loves me some elk steak.
Probably the most effective way for government to reduce gun crime is to require federally licensed arms dealers to have a regular storefront and keep accurate, auditable records. The lionshare of guns used in crimes come from licensed dealers who sell out of their homes...to anybody.
As for banning weapons that look like assault rifles, that seems prudent if the weapon and can be readily converted to a fully automatic, which is already illegal. Otherwise, it seems pointless.