The Lewis Foundation is a private foundation primarily funded by its president Adam J. Lewis.  Adam Lewis is the son of the late billionaire Peter B. Lewis, the former chairman of Progressive Insurance and a noted liberal advocacy philanthropist who was among the first members of the liberal donor collective Democracy Alliance (DA).  During his life Peter donated millions of dollars to Democratic campaigns and spent his later years advocating for the legalization of marijuana. 
Adam Lewis’s foundation continues Peter Lewis’s philanthropy with continued donations to left-leaning activism organizations like the American Civil Liberties Union (ACLU) and grants to environmentalist groups like the Rocky Mountain Institute.  Adam Lewis continues to personally support liberal politics and has contributed upwards of $850,000 to liberal campaigns and candidates since 2004. 
The Lewis Foundation carries on the philanthropic legacy of Peter B. Lewis, the former chairman of Progressive Insurance and a major donor to liberal advocacy. Some of Lewis’ largest personal contributions went to organizations like the Center for American Progress (CAP), the American Civil Liberties Union (ACLU), and Media Matters for America. During the 2004 Presidential election, Lewis donated more than $23 million to liberal groups in an effort to elect Democratic nominee John Kerry. In his later years, he donated millions of dollars to marijuana legalization efforts.  In addition to the Lewis Foundation, Lewis created the PBL Fund and the Management Center. 
The Lewis Foundation continues to donate to the American Civil Liberties Union (ACLU), and gives a substantial amount of money to environmentalist groups like the Rocky Mountain Institute, who has received $2 million in grants since 2015. 
Adam J. Lewis, son of Peter B. Lewis, is the president of the Lewis Foundation. He is a board member of Spear Point Energy, a solar energy company, and a supporter of the Presidential Climate Action Project.  Lewis is a large political donor, who has contributed upwards of $850,000 to liberal campaigns and candidates between 2004 and 2019. He has donated to many of the 2020 democratic presidential candidates including Tim Ryan, Elizabeth Warren, Beto O’Rourke, Cory Booker, Jay Inslee, John Hickenlooper, and Andrew Yang.