What producer and political activist co-founded a production company with Bud Yorkin?
Tandem Productions: Tandem Productions, Inc. (a.k.a. Tandem Enterprises, Inc.) was a film and television production company that was founded in 1958 by television director Bud Yorkin and television writer/producer Norman Lear. Norman Lear:  As a political activist, he founded the advocacy organization People for the American Way in 1981 and has supported First Amendment rights and progressive causes.
Norman Lear