So, Gen Flynn posted on his CloutHub account "I like Ike", over the weekend.

https://app.clouthub.com/post/8b9de261-6edd-11eb-8202-a10bdd2e1a8d

Gen. Eisenhower was the last commanding General we had as POTUS, and also happened to be POTUS #34

Anons in the comments found this link about the Communist Control Act:

https://www.presidency.ucsb.edu/documents/statement-the-president-upon-signing-the-communist-control-act-1954