According to Politico, there was a time when the infamous Koch brothers were not the worst:
The Koch brothers are the Democrats’ public enemy No. 1. But there was a time not too long ago that billionaires Charles and David Koch were modest Democratic Party donors.
Though the Kochs have poured untold millions into conservative and libertarian causes over the years, the political action committee for their privately held Koch Industries also has given money through the years to Democratic causes and candidates — including Mark Pryor, Mary Landrieu and Chuck Schumer — as part of the influence-peddling game that many corporations and wealthy donors play.