Alice Walton, one of the Wal-Mart fortune heirs, is an early backer of Hillary Clinton's Ready for Hillary super-PAC. Source: Brookings InstituteMutli-media master Donald Trump routinely comments on numerous political issues, and has succeeded in amassing a large following of conservatives. Source: Brookings InstituteMarc Andreessen backed GOP presidential candidate Romney in 2012. He's interested in the future of journalism — and in particular, the swift transition from traditional media to digital. Source: Brookings InstitutePeterson argues for the reduction of government debt, and with his foundation has funded organizations such as Fix the Debt and the Committee for a Responsible Federal Budget. Source: Brookings InstitutePaul Singer — a conservative Republic — has been a support of same-sex marriage and has a political action committee American Unity that contributed $2 million in support to GOP legislators who also are in support of same-sex marriage. Source: Brookings InstituteUntil recently, Art Pope was North Carolina's state budget director, and has been influential in the resurgence of the GOP in the state. Source: Brookings Institute14. The Omidyars criticized U.S. surveillance, and their foundation works on government transparency, property rights, and economic development. Source: Brookings InstituteJeff Bezos recently purchases the Washington Post, and have supported $2.5 million to the Washington state referendum in support of same-sex marriage. Source: Brookings InstituteZuckerberg works on immigration reform with the FWD.us organization, and has pushed for school reform in Newark, New Jersey. Source: Brookings InstitutePeter Thiel contributed $2.6 million to the super-PAC for Ron Paul in 2012, and he recently expressed support for increased minimum wage. Source: Brookings InstituteBuffett has been a strong Obama supporter, and advocates higher taxes on wealthy individuals. Source: Brookings InstitutePritzker is an Obama supporter and served as U.S. Secretary of Commerce in his administration. Source: Brookings InstituteThe Arnolds have contributed millions to state law makers in order to shift costs to employees and reduce pension benefits. Source: Brookings InstituteThe Bill & Melinda Gates Foundation has been extremely influential in education reform, and contributed $100,000 to support same-sex marriage in a Washington state referendum. Source: Brookings InstituteMurdoch owns both the Wall Street Journal and Fox News — two major news organizations. Plus, he works with Bloomberg on immigration reform. Source: Brookings InstituteSoros gave $1 million to Obama in 2012, and signed up as the co-finance chair of the Ready for Hillary super PAC. Source: Brookings InstituteAdelson spent a whopping $93 million seeking to defeat President Barack Obama in 2012, and promised to spend two times that much next election. Source: Brookings InstituteSteyer is interested in climate change and works extensively to raise public awareness. Source: Brookings InstituteBloomberg is donating $50 million against the NRA with his super-PAC Independence USA. He also has the nonprofit organizations Mayors Against Illegal Guns, Everytown for Gun Safety, and Partnership for a New American Economy. Source: Brookings InstituteThe Koch brothers have contributed $30 million in campaign ads targeting vulnerable Senate Democrats in a number of states and that number is expected to rise to $290 million by Election Day. Plus, they are running ads against Obama's health care. Source: Brookings InstituteCheck out these Mindblowing Facts About Warren Buffett And His Incredible Wealth »