Unlike Churchill, Bush had the power to go it alone. Do you think that Churchill would not have gone to war with Germany, had England the power to do so alone?

Churchill had no choice -- England could not have withstood Germany's might alone. Nor could the USSR. In the case of England, that country had the will and the skill but not sufficient population and not sufficient industrial capacity. Canada and the USA supplied both. Eventually these three countries formed a unified command structure and common strategy and tactics that would have defeated Germany whether or not the USSR entered the war. It would have been a tremendous undertaking had the USSR not been absorbing huge punishment (and later, inflicting it) on Germany's Eastern front.

In the case of the USSR, they had manpower beyond Hitler's comprehension but the USSR did not have the war-fighting skill necessary to win (Lenin & Stalin had essentially eradicated the officer corps and substituted their own version of political correctness in place of sound military doctrine) or even for a stalemate until the USA & Canada came to their relief through massive sea-lift replenishment of all manner of war-making material. Because of our combined support in materiel, the USSR was given the time to learn military tactics the hard way -- huge, disastrous battles with terrific loss of life to the USSR. But through attrition, the Soviet Army gained general officers and tactics that could match and eventually overcome the war-weary, and depleted German Army.

B