No senators have come forward with anything, that I have seen.
We are not worried about gun control coming from the House. It won't pass. That's not to say we take the threats and bills lightly, it's just a straightforward opinion. Clinton will tell you (and publicly stated so), NRA costs people elections.
NRA is easily the largest and most powerful political lobby in the country, that may change with the Citizens United decision, but, for now, its the truth.