Well of course they did.
Check it out:

Less than 24 hours after mentally disturbed soldier, Ivan Lopez killed three people at Fort Hood, gun control activists have already begun using this tragedy to push a partisan agenda.

Former New York City Mayor Michael Bloomberg’s anti-gun group put out a statement last night quickly turned from condolences to politics: “Days like this remind us that killers with illegal guns murder 33 more people every day across America.”

The founder of ‘Moms Demand Action’ tweeted last night, “When will Congress take action to end the war at home?