[Bernard Marx]

Double irony: didn’t it finally emerge that Henry Wallace was a communist agent, and that was why FDR dropped him from the ticket?

He was definitely a Communist sympathizer and "useful idiot" but I don't think he was a formal Soviet agent per se. He served as Roosevelt's VP for a term but the Democrat Party named Harry Truman to replace him in the next election. Wallace later was the 1948 Presidential candidate for -- guess what -- the Progressive Party.

[La Lydia]

According to Wiki, which I know isn't infallible, Wallace was endorsed by the Communist Party (USA), and his subsequent refusal to publicly disavow any Communist support cost him the backing of many anti-Communist liberals and socialists, such as Norman Thomas. Christopher Andrew, a University of Cambridge historian working with evidence in the famed Mitrokhin Archive, has stated publicly that he believed Wallace was a confirmed KGB agent.