In 1934, Sinclair ran in the California gubernatorial election as a Democrat. Sinclair's platform, known as the End Poverty in California movement (EPIC), galvanized the support of the Democratic Party, and Sinclair gained its nomination. Gaining 879,000 votes made this his most successful run for office, but incumbent Governor Frank Merriam defeated him by a sizable margin, gaining 1,138,000 votes. Hollywood studio bosses unanimously opposed Sinclair. They pressured their employees to assist and vote for Merriam's campaign, and made false propaganda films attacking Sinclair, giving him no opportunity to respond. The unethical campaign tactics used against Sinclair are briefly depicted in the 2020 American biographical drama film "Mank".