(CNN/CBS4) — A pro-gun control group will launch a $5 million ad campaign targeting voters in 15 contentious US House races, including the race in Colorado’s 6th Congressional District.

Everytown for Gun Safety Action Fund, announced Tuesday its plans to reach voters in several congressional swing districts in a new digital ad campaign titled “Not One More.”

The campaign from the group founded by former New York City Mayor Michael Bloomberg will initally focus on 15 congressional districts that the group is working to flip red-to-blue or hold onto in tight races. CNN rates seven of the targeted races as a toss up, seven as lean Democrat and one as likely Republican.

“‘Not one more’ — three simple words that serve as both a statement of principle and a call to action for the growing gun safety movement,” said John Feinblatt, president of Everytown for Gun Safety. “This urgent ad campaign will inspire even more Americans to head to the polls on November 6 and vote for their local gun-sense champions.”

AR-15 semi-automatic guns on display. (Photo by George Frey/Getty Images)

The ads including pictures from shootings scenes from will run in congressional districts in California, Colorado, Georgia, Kansas, Minnesota, Nevada, Florida, Michigan, New Jersey, Washington and Virginia. One ad reads, “Not one more high school. Not one more church. Not one more concert, office, campus, newspaper, kindergarten class. Not one more.”

Inspired by Richard Martinez, the father of a gun-violence victim, the new campaign aims to target younger voters, women and people of color in GOP-held districts.

“Every day in our country, families like mine get the news that a loved one has been shot and killed by senseless gun violence,” Martinez said in a press release. “This November, Americans can use their voices and their votes to elect lawmakers who will stand up for the safety of our families and communities.”

By Rachel Ventresca, CNN

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