San Francisco billionaire hedge fund manager Tom Steyer has been among the biggest financiers of the anti-Trump movement through his California-based political action committee.
Now, with the presidential election tightening, he's ramping up spending nationally by funding ad campaigns in five swing states.
NextGen Climate Action, an environmental advocacy group founded by Steyer in 2013, has spent $300,000 since July 8, running digital ads that target 18- to 35- year-olds in Nevada, Colorado, Ohio, Pennsylvania and New Hampshire. That accounts for almost half of the 11 battleground states that could go to either Democratic presumptive nominee Hillary Clinton or Donald Trump on the Republican side in November, according to YouGov.
Steyer, founder of Farallon Capital, has been active in California politics for well over a decade, serving as a delegate to the Democratic National Conventions in 2004 and 2008. He left Farallon in 2012 and is president of NextGen Climate.
Steyer's philanthropic work has focused largely on environmental protection, and in 2010 he and his wife signed onto Warren Buffett's "Giving Pledge," committing to give the majority of their wealth to charity.
Four years later, Steyer was the single largest donor to outside organizations in the midterm elections, giving $73.7 million to liberals, according to the Center for Responsive Politics.
Steyer's groups — NextGen California and NextGen Climate — have spent $5.1 million opposing Trump in this cycle, fourth highest among organizations, based on data from CRP. Almost half of that money has been spent in the past 11 days.