Pros: Who doesn't love Big Al? After Barack and the Clintons, Gore is the next democrat heavyweight (literally) who will do wonders for firing up the democratic base. He brings a familiarity with the White House and the chops to confront the looming energy crisis.
Cons: In addition to the near certainty that he will decline any vice presidential nod, Al hasn't shone the ability to bring home the votes. He lost his home state of Tennessee in 2000, and his past association with the Clintons could trigger additional Republican angst and doesn't jive with Obama's change rhetoric.
Ideological Similiarity: 9
Added Electability: 7