I just had to link to this article because Alan Keyes says it so well. Palin's powers as VP are such that she will not suddenly transform McCain into the evangelical's version of a knight in shining armour.
But won't Vice President Palin be able to prevent President McCain from making decisions that conflict with Christian conscience? I can think of no example of a morally principled, but unequally yoked, running mate who achieved this result once in office. The American republics are based upon Constitutional principles inconsistent with a divided executive. Therefore, lieutenant governors and vice presidents have no reliable say over the chief executive's decisions and actions. This would be especially true of someone like Gov. Palin, who will enter office with no strong national constituency of her own beyond the possible influence of those supposed moral leaders whose unprincipled support for McCain has already placed them at his mercy.