To be fair, Democrats generally want reasonable restrictions on guns, such as ones that would have prevented this person from owning them and more liberal ones would have supported mental health programs to help this person not reach this point, Republicans want neither.
I’m in favor of mental health checks on an annual basis. Crazy people shouldn’t have access to guns. And you can bipartisan this all you want, the VAST majority of irresponsible gun owners are REPUBLICANS (or whatever center->right bullshit title they choose. LiBeRrRtaRrRiANz