The only way to keep the US out of the war would have been to kill FDR.

He was a prime conspirator in US entry into WW I and he worked hard to get them into WW II.

The Germans refused to rise to the bait but he pushed the Japanese over the brink.

The Axis was still fighting an undeclared war the US. I don’t know how big a drain it was on them

Seemingly the only way to have kept the US out of the war was to have a different man in office.