NEW : The pact `` will enhance our leadership to stop the spread of nuclear weapons and seek the peace of a world without them , '' Obama added . Trump criticizes a Russian treaty designed to protect U.S. missile defense plans . The lower house of the Russian parliament has approved it . The treaty , between the U.S. and Russia , would reduce nuclear proliferation . The U.S. Senate approved the treaty this week .
NEW : Trump criticizes a Russian treaty designed to protect U.S. missile defense plans . The lower house of the Russian parliament has approved it . The treaty , between the U.S. and Russia , would reduce nuclear proliferation . The U.S. Senate approved the treaty this week .