Club for Growth Action is running an ad accusing the Democratic Party and billionaire donors of rigging the presidential primary for Joe Biden.
Trump nominates a Republican to the Federal Election Commission who has fought against donor transparency and has ties to the Koch political network, while leaving the Democratic seat vacant.
Biden and Warren have both benefited from a combined $24 million worth of spending by independent groups, while pro-Sanders groups have spent only $1.2 million.
Presidential candidate Michael Bloomberg portrays himself as an environmentalist, but numerous candidates he has financed have voted to advance oil, gas, and coal interests.
Fossil fuels companies and executives have contributed $18.8 million so far, with Koch Industries leading the pack.
A study by Avaaz shows that the company is recommending climate disinformation to users, and much of it comes from groups funded by Charles Koch and his allies.
Over the last decade, the deep-pocketed former Republican used his wealth to help give control of the Senate to Republicans.
Right-wing funders have given nearly $69 million to 11 groups that submitted Supreme Court amicus briefs in support of eliminating the Consumer Financial Protection Board, a key reform enacted in the wake of the Great Recession.
The recent donation is one of many contributions that GEO Group has made via its subsidiaries, potentially skirting federal campaign finance rules.
Third Way, a think tank funded by the likes of Amgen, Pacific Gas & Electric, and Reynolds American tobacco, is warning Iowa voters about the democratic socialist candidate.