Mr. Mercer, a hedge-fund magnate, is reportedly the main donor to a network of four super-PACs all backing Senator Cruz. Within a few weeks of Cruz鈥檚 campaign launch on March 23, the pro-Cruz super-PACS, all containing the words 鈥淜eep the Promise,鈥 had raised an eye-popping $31 million.
A in The New York Times described Mercer as a 鈥渞eclusive Long Islander,鈥 who shares with Cruz 鈥渁 passion for unbridled markets, concerns about the Internal Revenue Service, and a skeptical view of climate change.鈥 Mercer鈥檚 net worth is undisclosed. He is the co-CEO of the hedge fund Renaissance Technologies.