A few years ago, after a discussion here on the idea, the following scenario was put together. I thought it was about time to revisit the idea. So, in a nutshell:
PoD is Germany practices armed resistance against French Occupation of the Ruhr in 1923 and are crushed. The Weimar Republic falls into chaos; the Communists rise in Danzing; the monarchy in Germany is restored backed by the far right (including Ludendorff and his Nazi allies). When Stalin's capos make a move too soon and the Stalinites are purged, the eventual result is the reign of the Trotskyists, with the Government headed by Ivan Smirnov -- though Trotsky himself is eventually placed into an exile of sorts as diplomat in Haiti. Foreign Secretary Rakovsky, meanwhile, continues to push hard for international revolution. With Continental Europe falling to authoritarians of all stripes, and with a war with the Soviets looming, the economy goes into another free fall similar to 1920. As a result, in the US, the Democrats win in 1924 -- only their Presidential candidate is the KKK endorsed Wiilaim McAdoo. Oh, and not only do butterflies mean DC Stephenson doesn't get caught in 1925, but that in turn gets him appointed US Senator that year.