This report describes the current status of the Intermediate-Range Nuclear Forces (INF) Treaty between Russia and the United States and highlights issues that Congress may address regarding compliance concerns with Russia. It provides a historical overview; outlines the provisions of the INF Treaty (highlighting those central to the discussion about Russia's current activities); reviews the publicly-available information about the potential Russian violation and Russia's possible motivations; and summarizes Russia's concerns with U.S. compliance. The report concludes with a discussion of options that the United States might pursue and options if Russia deploys new INF-range missiles.