During his 40 months in office, events have tested #Biden’s vision of American world leadership. #Alliances haven’t been enough to win a new European #war in #Ukraine. US #power & leverage haven’t prevented a #humanitarian catastrophe in the #MiddleEast, marked by alleged #WarCrimes. #Putin is trying to assemble an axis of #autocrats from #Tehran to #Beijing. In #China, the US faces an adversary potentially its equal in economic & military power intent on tearing down the American #GlobalOrder.