John “Bluto” Blutarsky and Joseph “Slow Joe” Biden do have something in common, and it not soaring intellect.  Rather both have been said to have served in the Senate, video:

Speaking with Pennsylvania Governor manag3ed several historical facts,
from Daily Caller:

“That’s right, but we declared our independence on December the 7th, by the way,” Biden replied.

Delaware actually declared independence — both from Pennsylvania and British colonial rule — on June 15, 1776.

“That’s not just D-Day,” Biden continued, still laughing.

The Allied invasion of Normandy, recognized as D-Day, actually took place on June 6, 1944. It was the Japanese airstrike on Pearl Harbor that took place on December 7, 1941.

The real date that the former vice president was likely trying to reference was the day that Delaware ratified the U.S. Constitution: December 7, 1787.

Forty-Three was famous for mangling particular words.  Whereas Slow Joe scrambles ideas.  While Forty-Three could never pronounce nuclear, he at least he knew where the button was.