The U.S. and its allies could cut off all trade with Russia in response to their invasion, hoping to cripple them economically.  However, one Russian official made a comment that the West talks and talks and then does nothing.  Because of our weak leadership, Putin sees an opportunity to rebuild the Soviet Union to a super power.  It concerns me to think that he has three more years of this "weak leadership" to go forth and conquer----so much time to inflict a lot of damage.