Dick Lugar: “The treaty explicitly states that, modernization and replacement of strategic offensive arms may be carried out.”

That is a very dangerous attitude to take.

In the likely event the INF Treaty collapses in August, the only remaining bilateral U.S.-Russia arms control agreement would be New START, which expires in 2021 but can be extended by up to five years through agreement by both parties.

Several members of Congress have already proposed legislation along these lines.

Yes, I believe New START meets this threshold with one exception.