He won’t complete his term. There are a number of ways that this could play out, but I say Biden will be president, at least for a short while.
I'm betting on an overdose of prescription meds...
Oh, he'll no doubt complete the term ... but I suspect that by the end he'll be about as effective as Woodrow Wilson was toward the end of his last term. The only question is, who will be Obama's equivalent of Edith Wilson?
I vote Valerie Jarrett, but there are probably others...