you need 60 votes, and to answer your question there's very little evidence that any of that calculus has changed, a group of republicans and democrats that have been working for a long time to try to see if there's a middle way for some of the more less extreme examples of gun control proposals to pass, but they continue to run into a brick wall time and time again and it's because of the power of the nra, any time a proposal likes this begins tract, as the reminders are so quick that they are reluctant to do any half measures at all. perhaps there's something that can be done with 60 votes. i haven't seen evidence of that but if that's the case a lot of people are worried more needs to be done and in the wake of a tragedy like this you need to