The Communist Party USA is involved in campaigning on behalf of U.S. Senate candidate Kyrsten Sinema, a Democrat from Arizona. According to Joelle Fishman, head of the Communist Party’s powerful Political Action Commission, the party has injected itself into races “in two states where a Republican seat can be flipped: AZ (Flake open), TX (Cruz).” During her term in the Arizona state legislature, for example, Sinema was a founder of the leftist Progressive Caucus. Sinema has helped lead numerous leftist national boards, including the Center for Progressive Leadership, Progressive States Network, and the Democratic Socialists of America-affiliated Progressive Democrats of...