Washington is very upset about Turkeys purchase of Russian missile defense systems and could impose sanctions on Ankara if it does not "get rid" of them, White House National Security Adviser Robert OBrien said on Sunday. "Turkey will feel the impact of those sanctions," OBrien told CBSs "Face the Nation" in an interview, referring to penalties under the US law known as the Countering Americas Adversaries Through Sanctions Act, which he said would pass Congress with "overwhelming" bipartisan support. His comments came ahead of a visit by Turkish President Recep Tayyip Erdogan to Washington on Nov. 13 to meet US President Donald Trump for likely crucial talks as the two NATO allies have been at loggerheads over a range of issues. One key disagreement is Ankaras purchase of the Russian S-400 anti-aircraft missile system, which Washington says is incompatible with NATO defenses and threatens its Lockheed Martin F-35 fighter jets. Despite threats of US sanctions, Turkey started receiving its first S-400 deliveries in July. In response, Washington removed Turkey from the F-35 program, in which Ankara was a manufacturer and buyer. But so far, it has not slapped any sanctions on Ankara. Turkey has not yet activated the S-400 batteries it received, and Washington still hopes to persuade its ally to "walk away" from the Russian systems. "Theres no place in NATO for the S-400. Theres no place in NATO for significant Russian military purchases. Thats a message that the president will deliver to him (Erdogan) very clearly when hes here," OBrien said. Earlier this month, the head of Turkeys Defense Industry Directorate said a second S-400 delivery to Turkey may be delayed beyond a planned 2020 timeline by talks on technology sharing and joint production.