That's quite a contrast to Obama -- or even to HRC. They both have shown a passion to remake the world that old white guy Joe can't match.
He's with Obama because Obama needed somebody from his demographic to balance the ticket, but what he'd do as president could be substantially different from what Barack wants.
Or at least Joe would be half-hearted enough about following the BHO line that Obama's team might actually prefer Hillary Clinton.
Joe would do what Obama wanted or die. Simple as that. Don’t know if he’s up for that game though. .