Gov. Jared Polis said that America has seen too many of these acts of violence, but with less than 24 hours after the tragedy, the focus should be on those harmed.
Advocates say there's a lot more to do as critics gear up for legal challenges and potential recall efforts.
The killing of a Douglas County deputy over a year ago helped spark the push for a law to temporarily remove guns from people judged to be a risk to themselves or others. But on Tuesday, county commissioners said if such a policy is enacted, they won't enforce it.
It was a 7-4 party-line vote to advance the bill to the House Appropriations Committee.