President Obama has weakened the credibility of his foreign policies, the very thing he needs to preserve. He must "re-establish deterrence" and "must be seen to stand by his threats," as The Economist put it. Otherwise, immense damage to U.S. interests is now a threat over the next three and a half years until the administration is changed and there can be a shift in the momentum on the political battlefields.The chaos of the international arena requires the capacity to enforce laws and treaties, and only America can play that role. If it does not, American interests and its own values will be eroded. As the highly respected House Intelligence Committee Chairman Mike Rogers (R-Mich.) put it, "Putin is playing chess and we're playing tic-tac-toe." This is government by public opinion polls and the best example of Mr. Obama at his worst.