The Obama administration suspected for years, and later confirmed, that Russia built a missile in violation of the Intermediate-Range Nuclear Forces (INF) Treaty

Signed by President Ronald Reagan, the bilateral U.S.-Russian pact prohibits construction, testing or deployment of missiles or delivery systems with a range of between 500 and 5,500 kilometers.The Trump administration is now supporting Congressional efforts to also violate the INF Treaty by building a cruise missile in the prohibited range. “It would be a mistake to believe that the pursuit of a INF-noncompliant cruise missile by the United States will compel Russia to acknowledge and rectify its suspected INF violations,” said Arms Control Association Executive Director Daryl Kimball.

Josh Rogin, “Russia Has Deployed a Banned Nuclear Missile. Now the U.S. Threatens to Build One,” Washington Post, November 16, 2017