The leaders of three branches of the U.S. military slammed Sen. Tommy Tuberville (R-Ala.) over his monthslong blockade of senior military promotions Tuesday, with one accusing the Republican senator of “aiding and abetting communists.”

“For someone who was born in a communist country, I would have never imagined that actually one of our own senators would actually be aiding and abetting communists and other autocratic regimes around the world,” Navy Secretary Carlos Del Toro — a Cuban-born Navy veteran — said Tuesday during an interview on CNN alongside Air Force Secretary Frank Kendall and Army Secretary Christine Wormuth.

“This is having a real negative impact and will continue to have a real negative impact on our combat readiness,” Del Toro added.