Wilson?
No integration for the Armed Forces while HE'S president. It may take until 1920, or even until the 1930's. Regardless, though, we'll integrate when the onset of the 2nd World War necessitates it.
Maybe we would have "switched sides" to fight for the Central Powers in the 2ndWW, though. We were pretty close to fighting for them in the 1stWW before deciding to remain neutral, so maybe we would have been on the winning side! At least he would have kept us out of the 1stWW.
Don't laugh, we had a lot of common interests with the Deutschreich, the Crown Prince's wife was an American, remember!
We coulda been on top o' the world!