(COMMON DREAMS) Nadia Prupis, January 13, 2016 — Dark money groups have spent $143 million on the 2016 U.S. presidential election since last July—nearly four times as much as the candidates’ own campaigns, Politico reported in a new analysis on Tuesday.

The origins of most of that funding will never be revealed, while some of it will be made public at midnight on January 31, just hours before the Iowa caucuses, writes Politico’s chief investigative reporter Kenneth P. Vogel.

Source: Who’s Funding the 2016 Election? Mostly, We’ll Never Know.