No they haven't. If they thought they could get away with it, they'd pass anti-gun laws in a "New York second". The victories Schneider touts are the result of damned hard work on the part of gun owners, not any "enlightenment" on the part of Democrats. The new crop of supposed "Blue Dog" Democrats adopted pro-gun camouflage to get elected---but watch how they vote if given the opportunity.
I've been watching. It's been very rare that they cross the NRA. I don't recall any in the House except the committed gun grabbers. In the Senate, there's Gillibrand and shaky Pryor.
Other Democrats, such as Pennsylvania's Bob Casey and Colorado's Mark Udall and Michael Bennet, were said to have been willing to vote "no" if necessary.