Say World War 2 had ended in a ceasefire between the US/UK/USSR and Germany, and there is an ensuing Cold War as with the OTL, but it is three way between the US, USSR, and Germany. Obviously, without the fall of the Reich, von Braun and Nazi Germany's scientists remains in Germany.
So what would become of the American program without Braun and the Germans? Would an American native be able to take the lead with all American scientists and/or carry it to such success? Would rockets look different and be developed differently, or would the US manage to retrofit some captured V-2's still? And for that matter, how would the German rockets be and look like? Etc. And overall, what becomes of the space race?