If Ron Paul were president and congress declares war on any nation, even Canada, for whatever reason, he will follow the constitution and we will go to war.
Neo-cons need to get it through their stubborn heads that war is declared by congress, not the president. And the president can't vote against going to war if it is declared by congress.
More importantly, the president CAN NOT declare war on his own free will.
So, if you have a man that has voted according to the constitution all his political career, placing it above his political party, why would you fear his foreign policy? It can only mean that you fear our constitution is weak or outdated.
Why would you ever vote for anyone that refuses to follow the constitution?