Churchill's defeat was largely unrelated to his war policy -- it was his advocacy of a grim, wartime domestic austerity policy that did him in. Cavuto's analogy is actually even more apt than I think even he realizes.
Well, there is a parallel, no question. However, as statesmen and war time leader Bush can't hold a candle to Sir Winston Churchill. Churchill is in a league of his own ... I'm sure Bush would be flattered by the comparison to Churchill, after all, Churchill is a giant among statesmen and world leaders by any standard. In fact, Bush has taken his lead from the master ... whom he holds in high esteem.