The Biden administration on Tuesday formally accused Russia of violating the New START arms treaty over what it said was Moscow‘s failure to allow inspections of weapons sites or agree to meetings on treaty disputes. President Biden agreed to extend the New START treaty — one of the last major arms control treaties still in force — for five years shortly after taking office in January 2021 — without seeking changes or concessions from the Kremlin related to its strategic forces buildup. Russian President Vladimir Putin’s decision to invade Ukraine barely a year later has put bilateral relations in a...