Dark money critic Mark Kelly receives huge boost from dark money group in AZ Senate race

Mark Kelly, an opponent of dark money in politics, is now receiving backing from a dark money-fueled committee that works to get Latino voters to the polls in battleground states.

Somos PAC is primarily bankrolled by anonymous donations passed through nonprofits. Kelly has said that undisclosed contributions are "poisoning" the American political system and "drowning out the voices of everyday Arizonans."

According to Somos PAC's filings, the group has received $4.1 million from the North Fund, a nonprofit that hides its donors and boasts connections to a billion-dollar dark money network managed by the Washington, D.C.-based Arabella Advisors consulting firm.