Commentary If it were an intentional tactic, President Joe Biden would deserve respect for originality in introducing planned incoherence and impenetrable self-contradiction into the arsenal of third-parties meddling in a war. In the last two weeks he has, to the astonishment of the world and the consternation of his entourage, called Russian president Putin a “war criminal” and said that he “cannot remain in power.” He has prepared American airborne troops in Poland for what they will find when they enter the war theater in Ukraine, and he has promised that any escalation to chemical or biological or, implicitly, nuclear weapons by Russia will be met by a “response in kind.” Immediately after these portentous utterances, the much over-worked White House gaffe-correction and denial squad walked back the president’s remarks and assured the world that the United States had no intention to achieve regime-change in Russia, nor to introduce its …