This comes up every now and then. I don't see it getting anywhere any time soon, if ever. These things go into committee more times than not and never come out.
Maybe if Barrack Obama gets a second term it may see some movement, but even then I don't think much will happen. There's just too much empirical data that the last one didn't have any effect. That makes it very much easier for pro-2A people to call out this foolishness.
EDIT: This is certainly not to say that you shouldn't be letting your representatives know about this and what you think. You absolutely should!