R always deflect to mental health. But Reagan dismantled our mental health infrastructure, and R consistently votes against spending in that area. (Probably because they won't ever seem to vote for anything that helps people, only for taking things from people.)
So R needs to support gun control, OR support funding mental health services, OR come clean and admit that school shootings are a price they are willing to pay as long as they get to keep their weapons and do as they will with them.
(They did like the mulford act, but we all know what that was really about. The one thing more important that guns to that crowd.)