Open Secrets: “With the 2016 election cycle bringing previously unmatched amounts of ‘dark money‘ spending by politically active nonprofits, one group stands out for blazing its own trail: Conservative Solutions Project, the 501(c)(4) social welfare organization supporting Sen. Marco Rubio’s aborted presidential campaign.”

“New tax documents obtained by the Center for Responsive Politics show that within weeks of Rubio throwing his hat in the ring on April 13, 2015, the nonprofit had raised $13.8 million — $13.5 million of which came from a single, unnamed donor. And most of the money that went out the door went to firms and consultants running the group or to other agencies closely linked to Rubio and his campaign.”