I have no illusions that this will sadly most likely get passed. A friend of mine said that apparently we've lost the House, now whether that is true or not I do not know
But in the end, I don't think it matters, there are plent of anti' within the R-party as there are pro 2A within the D-party. Political parties aside, many people as you've said are still riding the waves of emotion, and unfortunately, we'll probably see some form of draconic legislation being passed because of it.
The only thing we can do I think is try to contain the damage as much as possible at this point. We can only speculate right now until more concrete information comes to light.