Ron Paul has been opposed to the war in Iraq since way before it ever even started. He started opposing at least as early as 1998 when the Congress passed a resolution for regime change in Iraq, and has been consistently opposed to it ever since.
Just opposed to the way it was being done. Dr. Paul himself drafted a Constitutional bill to officially Declare War on Iraq for reasons that had nothing to do with UN mandates.
Yes he has as I just noted on another thread. Not on nonsensical "no declaration" grounds, but because he thought Sadaam posed no threat, that we were complicit in his rise and his invasion of Kuwait, and that we'd alienate our allies.
He opposed the war, period.