John Kerry actually said...
Yes, I would have voted for the authority. I believe it is the right authority for a president to have. But I would have used that authority, as I have said throughout this campaign, effectively. I would have done this very differently from the way President Bush has.
Context
John Kerry responds affirmatively to whether he would have supported the authority to wage war in Iraq, while criticizing President Bush's execution of that authority.
08/08/2004