1. Florida. Gore's very presence is a living reminder of how easily things could have been so different without GW Bush.I would use Gore and Hillary to try and make a play for Florida.
2. Colorado. Gores's credibility ont he environment will appeal. They key is that McCain is not the typical Republican who thinks that global warming is a fairy tale. He has offerred up a cap & trade plan (without realizing that for a cap to work it has to be mandatory). Gore is the best person to attack McCain's plan.
3. As part of Obama's effort to reach out to evangelicals to promote planatary stewardship.