The super PAC started by New York City Mayor Michael Bloomberg (I) is putting its weight behind former state representative Robin Kelly in Illinois's 2nd District special election, releasing a new ad that touts her stance on gun control and criticizes two of her opponents on the issue.

"Kelly will join President Obama to take on the NRA for effective background checks and to ban deadly assault weapons," says the narrator of the ad. It's the first time the organization, Independence USA PAC, has mentioned Kelly in a TV ad.