Obama and his Communist administration couldn't care less about preventing mass shootings! Their "real purpose" of trying to control guns is to totally disarm the American Citizens. They know that they 'must' do that before they can fully implant their Totalitarian government under a Dictatorship.
And, you can bet that if these "Enemies Within" manage to establish their Dictatorship it will be *them* that will be doing the mass killing of American people. Just like the other Dictators who killed millions upon millions of their 'own' people!