Mine is this:
WKII is Germany against a totalist Internationale allied with Savinkov's Russia. Germany is unable to recover from Black Monday in time to effectively respond to early provocations like Sorelian France grabbing Wallonia and Romandie, and Russia pulling White Ruthenia into their sphere of influence after Sigismund's coup, also getting bogged down dealing with insurgencies in Indochina and the UBD. When the war actually starts, the Reichspakt is stretched too thin to effectively fight a two front war against the Internationale's modernized militaries and Russia's numbers. Germany and Austria are defeated by the mid-40's and Europe is partitioned between Russia and the Internationale. The Entente is ineffectual, and Nat France is invaded and reabsorbed into Sorelian France.
Olson wins the SCW, but remains isolationist throughout WKII while America rebuilds. The National Unity coalition breaks down after Olson dies and is succeeded by Quentin Roosevelt, under whom the Republicans and Progressives unify as one party. Reconstruction is highly lenient on the former rebels, many of whom continue to influence politics. Both former syndicalists and Longists rally around the anti-establishment Democrats, who eventually morph into a combination of far-left economics and far-right social policies.
This TL's Cold War starts in the early 50's when Russia attacks Japan while they're overextended trying to pacify China, successfully taking over Manchuria and Korea, and uses nukes developed jointly with France and Britain on major Japanese cities to force a surrender. This shocks America out of their isolationist stance, and the Republican-Progressive dominated government adopts an interventionist stance in hopes of containing the Russo-Internationale Bloc until it hopefully collapses on its own. As Europe is almost solidly under totalitarian rule, the Cold War is mainly naval standoffs in the Atlantic and a mess of proxy wars across post colonial Africa and Asia.