Elections and Beer

I was thinking about the current political standard of who one would "like to have a beer with," and it seems like a pretty iron-clad predictor of general election victory. The only exception is Nixon; most sane people would probably have a beer with anybody before Nixon, or even do anything rather than have a beer with Nixon. But consider:

Obama v. McCain: most I imagine would drink with Obama.
Bush v. Kerry: Definitely Bush.
Bush v. Gore: Definitely Bush.
Clinton v. Dole: Definitely Clinton.
Clinton v. Bush: Definitely Clinton.
Bush v. Dukakis: Bush by a whisker.
Reagan v. Mondale: Reagan wins.
Reagan v. Carter: I'd go with Carter but most people would probably go with Reagan.
Ford v. Carter: Carter by far.
Johnson v. Goldwater: I doubt there'd be anyone on the planet better to have a beer with than LBJ.
Kennedy v. Nixon: See my above remarks about Nixon.
Ike v. Stevenson: Ike for sure.

I don't know enough about most of the also-rans before that (Dewey?) but if it wasn't for Nixon winning twice, this would be pretty well infallible, and even so Nixon didn't run against particularly beer-worthy opponents. Although, if Bush's two elections were fraudulent that introduces another wrinkle...