First, I think the big reason Obama hasn't openly pushed gun bans

and other restrictions is
A: He used up an ENORMOUS amount of political capital in shoving Obamacare through, so he didn't have it to use for other things, and
B: Too many Democrats saying, behind the scenes, "You want to fuck us even MORE? Stay away from that!"
Take away either of those and we'd have had open attacks on the 2nd Amendment. As is, he's stuck with letting Holder talk about a new 'assault weapon' ban(maybe as a feeler, and didn't like what he felt) and pushing for federal judges and Supremes nominees who don't like the 2nd. And, I'm convinced at this point, making the 'under the radar' attack that we know as Gunwalker. That last tells us a lot about him and his minions(or handlers in some cases?): they were willing to violate US laws, subvert a number of LE agencies, to hand weapons to the murderers of the cartels in order to further their political aim. To let bodies pile up 'for the greater good'. And now they're all lying under oath and- I don't doubt- trying to destroy or cover-up evidence.

I keep coming back to that comment he made in Ohio, "I'm not going to take your guns away! Even if I wanted to, I don't have the votes!" and the attitude behind it. Obama isn't openly pushing for more anti-gun-ownership laws because it'd destroy any chance of reelection, and he knows he won't get them; otherwise he'd be out there talking about 'for our communities', 'for the safety of our children', etc.