New START placed tighter limits on deployed strategic weapons but Russia was actually already meeting the treaty’s limits, for the most part, when the treaty’s implementation began. Indeed, Russia has increased deployed nuclear weapons from 1,537 in February 2011 to 1,796 in September of this year. Also, the treaty does not restrict either country from stockpiling weapons, nor does it require them to destroy any existing weapons.
Russia’s total nuclear warhead arsenal has been on a steady decline, from 40,000, since 1986. During Obama’s presidency, Russia’s nuclear warhead total has hovered around 4,500 since 2012.