[South40]

McCain has to do something. A lot of folks are very unhappy and will not vote for him. Romney might bring some of those folks back.

I don't think there's much he can do to win over conservatives, not real conservatives. He'll probably do what he can to pull Hillary supporters from Obama, like name another liberal as his running mate.

[Arguendo]

I think most real conservatives are already supporting him. He needs a conservative running mate to get us excited enough to actively compaign for or give money to him though.