I always here, "we gotta do something" from the liberal left. Sometimes that is not the right answer if that "something" creates a bigger problem (I give the example throwing water on a grease fire).
That being said, I think one of the most obvious correlations with the recent past mass shootings is mental health. Sure, the left can make the argument that guns are the common factor but to me, that's like saying they all wore pants that day. Mental health is a concern in our society, but it doesn't seem like it's a 'major concern' when it should be. I don't run into those people who have mental health issues on a daily basis (any more) but that doesn't mean they aren't out there. And, when left to their own issues, they can create a horrific outcome.
So, if the left is clamoring to do something, why doesn't right say, 'ok, let's tackle mental health. let's figure a way to help integrate mental health professionals into the NICS/CBI system and get these two entities talking.'

I know I know, lots of pitfalls such as, categorizing people who own guns, belong to the NRA and think libertarian ideas as mentally defective....blablabla. So what is the real reason, the Right/GOP aren't countering POTUS and the Left with something such as mental health.

I think it would be outstanding for CO's two newest legislators to introduce something along those lines here at the local level with CBI.

Just spitballing.....