Weather its a different president in the us, real politic or something else the powers that Be in Versallies decides to throw in a poison pill that will ensure that the germans don't let the Kaiser back in.
So what do they do? Split off east prussia to become the kingdom of Prussia and let Kaiser Wilhelm be the king of that land. East Prussia other then losing the coridor to the poles are spared the endemities the war guilt, and the reperations payments. The kingdom gets a fresh start but the Kaiser is the one who has to sign versallies.
This is done so that the german's will be able to point to the Kaiser as the one who sold out germany in order to save his own ass. The kaiser having a choice between being king of nothing or being king of prussia signs.
The new republic of germany is thus forced to deal with Wilhelms last deal as king while he goes off to live in east prussia and continue to be king of a smaller country that doesn't have the restrictions germany deals with.
How does this change germany and german politics? and the world in general?