I say no. We have not really won a war since world war II. That's because congress has not declared war since the Attack on Pearl Harbor. Korea, Viet Nam, and now Iraq and Afghanistan [not counting ronald reagan's glorious victory in granada].
Article 2, Section 8 says that only congress has the power to declare war. They can not delegate their power to the president. This would be against the seperation of powers doctrine in constitutional law.
The ways in which the wars are being conducted are not enumerated in the constitution at all.