Take ten years off Bernie's age; how strong a position would he be in?

[Mr. Morden]

He would easily be the frontrunner for the nomination if he were even five years younger.  But 79 (his age on Election Day 2020) is really pushing it, so that downgrades the chances of him running from what they would be for a younger version of him.

[Mr. Morden]

Bernie Sanders knows it's too early to be discussing or even thinking about 2020.

Yeah, right. 

Trust me, these guys are already thinking about 2020.  Not just Sanders, but Warren, Booker, Gillibrand....all of them.  Not that I blame them, but "It's too early to think about that" is a convenient lie that they all tell in order to not appear too eager to move on from their current jobs.  This is especially necessary for those who are up in 2018, and have to go through the fiction of being interested in serving another complete term rather than move on to a presidential campaign a few months after being reelected.

[Mr. Morden]

Another fun question: Would Biden be the frontrunner if he were five years younger?