CNN CNN Newsroom March 24, 2013 21:07:00
He's helping brank bangroll a $12 million ad blitz. the campaign has its critics. >> i believe in the second amendment and i'll fight to protect it. but with rights come responsibilities. >> reporter: mayors against illegal guns. led by new york mayor michael bloomberg, is pouring $12 million into ads like these to push congress to act on guns. >> closing loopholes will stop criminals and the dangerously mentally ill from buying guns. >> reporter: here's the mayor on nbc's "meet the press." >> there are an awful lot of people that think that this is one of the great issues of our times, we hav...