If they do, they haven't been serious about it. They have ignored one of the most convenient tools for getting that message across to the public. That tool is graphics. Before you protest consider this:
When I was in high school, we were shown graphic scenes of traffic accident fatalities in vivid color. Those imagers still haunt me to day, and definitely had an immediate effect on most of us. We didn't stop driving but most students didn't speed as much or drink and drive as much for weeks.
Also consider this: There are places where you could walk down a busy thoroughfare and see poster sized images of aborted fetuses in vivid color. Those images, undoubtedly caused a lot of public backlash against abortion and contributed greatly to the RW Pro-Life cause.
But we have been spared the images of the mangled bodies of children killed at Sandy Hook by weapons like the AR-15. The liberals have not been as aggressive as the conservatives have at getting depictions of carnage posted and published. Liberals, if you want to be taken seriously on banning weapons like the AR-15 post images of the massacred people in Florida and of Sandy Hook. Bring those images forth to dwell on the public conscience. Be as dogged in that quest as the RW zealots have been in theirs.
You're correct and if the Progressive wanted to ban the AR-15 they would be working harder than waiting for the next lone wolf attack and praying it is the AR-15 or another semi-automatic weapon that kills scores of people.
Also let stop with the nonsense and admit that President Obama, Harry Reid and Nancy Pelosi failed the Progressive left on this issue. From 2009 to 2011 the Progressive Left had a House and Senate that could have passed another Assault Weapon Ban and did not, so why did they fail the Progressive Left?
Also why is it that President Obama waited until his own party lost the House to make their argument about having another Assault Weapon Ban?
Why wait until the GOP was in power of the House and now the Senate to push this agenda?
Simple, it is a wedge issue like immigration and he is using the Assault Weapon Ban to score political points with the hope the American people will forget his own Party did nothing when they had the chance to do something.
I am against anymore laws that will not do a damn thing and if President Obama had really cared about stopping those Semi-Automatic weapons like the AR-15 getting into the hands of criminals and terrorists then his own political party should have done something when they had the power to do something and not expect the opposition party to do their job for them...