Oooh, my favorite time period.

Looks interesting.
One pretty big question at the outset, though: how did Al Gore -- someone with no national infrastructure and very little name recognition outside of Tennessee -- wind up at the top of the ticket with a viable Gary Hart?
Here's what I mean: Hart was a juggernaut at this time; he'd fought Walter Mondale all the way to the convention in '84, enjoyed high levels of name recognition and approval, and had the good fortune to have the "Seven Dwarfs" as his primary opponents. Without the Donna Rice scandal, he'd be the overwhelming favorite to garner the 1988 nomination.
So either something happens to knock Hart off the pedestal -- at which point he's not a likely VP candidate -- or nothing does, at which point it's very difficult to imagine someone else beating him for the nomination.
I should add that "overwhelming favorite" doesn't mean "inevitable"; after all, I'd say that Hillary Clinton was probably the "overwhelming" favorite for the 2008 nomination, and we all saw how that turned out. But that required a pretty amazing confluence of factors, some pretty unique circumstances, and a powerhouse candidate and campaigner in Barack Obama.
Particularly in '88, I don't think Al Gore can be that candidate. Keep in mind that Al Gore as of 1988 was the Third Way, centrist, southern candidate, DLC Al Gore -- and in '88, the DLC was a much-reviled minority faction in the Democratic party. It wasn't until
after Dukakis pissed away what many believed was a very winnable election in '88 that Democratic Party insiders reluctantly agreed that something was wrong with the brand. And even then (with yet another powerhouse candidate in Bill Clinton), there was a pretty strong "stop Clinton" movement all the way through the end of the primaries.
If you're open to revisiting things, I'd suggest something like Hart-Clinton in '88. I also think you have Dems doing too well in the South. Even Clinton-Gore lost VA, NC, SC, AL, and MS -- and the only reason they won GA in '88 was because of Ross Perot; Clinton-Gore would lose all 6 states in '96 despite generally crushing Bob Dole. Conversely, even Michael Dukakis won NY in '88; it's hard to see any Republican winning it (even "home-stater" Jack Kemp).
Just some questions and thoughts. Keep at it!