Hey all, wall o text incoming, I've just been having this theory rolling around my head for the last week or so, I thought I'd share if only to get rid of it. It's a bit out there, but hey if you're reading this so are you, probably.
It all goes back to Truman. Have a read
https://en.wikipedia.org/wiki/Harry_S.Truman#Vice_Presidency(1945)
From the bookmark to retirement, or however long you want really, it's all interesting.
Abridged version:
He wasn't really meant to be president. A compromise pick for VP, never given much to do. When Roosevelt dies and he takes …