John Charles Eastman is an American lawyer who is the founding director of the Center for Constitutional Jurisprudence, a public interest law firm affiliated with the conservative think tank Claremont Institute. He is a former professor and dean at the Chapman University School of Law. He ran unsuccessfully as a Republican for California's 34th congressional district in 1990, and for the office of California Attorney General in 2010. He is a former law clerk to Supreme Court Justice Clarence Thomas.