Yes, notice the increase in gun violence news stories? The media wing of the dnc is in full swing trying to change public opinion on firearms. It my take them 3 years, 4 years or longer but they will keep at it.
IMO, that's a dangerous strategy for them.
I think that after VT, we've reached the mass-shooting saturation point, at least as far as media exposure is concerned. Columbine seemed to be it's peak, and even then not much if anything anti-gun was passed in it's aftermath. The Stockton CA got more done with the import bans than any of the larger, more recent shootings, IMO.
These massacres may change the views of the friends and families immediately affected by a spree shooting, but it seems to be losing traction with the American populace overall. Perhaps subconsciously more and more are beginning to understand it's the price paid for life in a free society.
Polling data after VT was soundly on our side too. Something like 60%+ felt that new gun laws would not prevent these kinds of killings. And these weren't just news wbesite polls that the various gun-boards managed to "freep". And while still shouted down, and marginalized, the "shoot back!" camp was finally heard seriously for the first time after VT. A huge step in of itself.