If Mayors Against Illegal Guns does jump into the race, it will join Americans for Responsible Solutions, the gun control group run by former Rep. Gabrielle Giffords (D-AZ). Americans for Responsible Solutions has reportedly sought to counter the National Rifle Association's $500,000 ad campaign against McAuliffe over his stances on gun restrictions. McAuliffe supports universal background checks and limiting the size of ammunition magazines.
In the same interview, Bloomberg also indicated that he's considering a major spending push in Arkansas to defeat Sen. Mark Pryor (D-AR) for voting against a bill that would have expanded background checks for gun purchases. That legislation failed to pass in April.