Sen. Marco Rubio, R-Fla., wants the Army to remove an officer who posted pictures of himself on social media promoting pro-communist messages, and is asking the United States Military Academy to consider rescinding his degree.

Rubio sent a letter to acting Army Secretary Ryan McCarthy on Tuesday to complain about 2nd Lt. Spenser Rapone’s conduct, and to ask whether West Point’s administrators or faculty knew about his pro-communist views. Rapone is now an infantry officer in the Army.