Our Contract-Breaker-in-Chief, Donny, has decided to abandon our obligations to that treaty:
https://www.bbc.com/news/world-us-canada-45930206. Smells like the 'war horny' walrus in the White House, John Bolton is working the puppet strings from behind a curtain. Donny blames the Russians. Apparently for developing the Novator 9M729 aka the SSC-8 in violation of the treaty. The 9M729 was reportedly deployed in early 2017. It is not clear to me where it is deployed, but it has mobility. And with GLONASS, their GPS, there would be no need for pre-surveyed launch sites.
About a year before we blamed the Russians for violating INF, they blamed the US for violating the treaty. Their claim is that ground based Aegis-Ashore system, deployed near their borders in Poland, Romania and soon in Japan, although primarily for ballistic missile defense can also launch cruise missiles. Possibly true as Aegis-Ashore uses the same type Vertical Launching System (VLS) used aboard warships that can launch a Tomahawk or an SM-3 or even an ASROC. Would there have to be major mods done in each VLS cell or tube to shift from a missile defense role to an offensive cruise missile? Seems to me they could just load the cells with standard sized canisters with different internal payloads to suit the mission, but I'm no guru. However Aegis-Ashore is NOT mobile like the 9M729, and would remain a fixed target.
By the way, this withdrawal from a nuclear treaty by the US is NOT a precedent. Bush Junior did the same to the ABM treaty in 2002. And Donny is infamous for breaking deals in order to try for a better advantage. My hope is that he will do the same thing here he did with NAFTA, that is: break the agreement for political reasons then sign a new one that is damn near identical but with a new name and call it a victory. He has a history of this, it is all about the PR.