Dick Lugar: “It's been very unclear, and it's been like a sine wave.”

The reasons for Russia's violation are unclear. But I believe the violation was likely due to a number of factors...

There is precedent for using patient diplomacy to resolve treaty violations.

Congress has the ability to press the administration on its strategy to prevent a new Euro-missile race and increased instability in the absence of the INF Treaty.

Congress could condition funding to develop new missiles on receipt from the administration of a comprehensive military, economic, and diplomatic strategy to bring Russia back into compliance with the treaty.