Democratic mega-donor and environmentalist Tom Steyer. Photo: Chip Somodevilla / Getty Images

Billionaire Democratic activist Tom Steyer is reportedly joining two prominent gun safety groups in a campaign to register high school students to vote ahead of the midterm elections, in the wake of last week's school shooting in Florida.

The details: Steyer told Politico in an interview on Thursday that his NextGen America group is working with gun safety groups started by former Arizona Rep. Gabby Giffords and former New York Mayor Michael Bloomberg. The campaign, per Politico, will launch on March 25 with a national voter registration drive targeting key states and districts represented by incumbent Republicans who voted against gun control measures and get campaign funds from the National Rifle Association.

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