George Holding, who began airing his own TV ads blasting the group as a front to elect his Democratic opponent.

POLITICO has identified 12 groups set up through the Sixteen Thirty Fund that have been involved in local health care and tax debates: Arizonans United for Health Care, Colorado United for Families, Floridians for a Fair Shake, Healthcare Voters of Nevada, Keep Iowa Healthy, Mainers Against Health Care Cuts, Michigan Families for Economic Prosperity, New Jersey for a Better Future, North Carolinians for a Fair Economy, Ohioans for Economic Opportunity, SoCal Health Care Coalition, and Speak Out CNY.

The Sixteen Thirty Fund serves as the “fiscal sponsor” of the groups. The groups’ money flows through the parent nonprofit, which also “provides compliance, financial, back office, legal and HR support” tohow much money was raised for and spent by the different projects.

The Sixteen Thirty Fund has been an active, if behind-the-scenes, player in the early political battles of the Trump administration.

It has raised significant sums from unions, according to Department of Labor records, and it has distributed millions of dollars to the League of Conservation Voters and other progressive groups in recent years, according to its tax filings. But it has also helped launch dozens of offshoots in the past two years alone.

Those offshoots include Demand Justice, the prominent nonprofit fighting to block Supreme Court nominee Brett Kavanaugh, which is a Sixteen Thirty Fund project, according to D.C. business records. So too are Save My Care, Not One Penny and Tax March, which have conducted nationwide advocacy campaigns