“Congress shall have power to … declare War” Congress hasn’t actually declared war since World War II.
Right here the Constitution says "Congress shall have the power ... to declare war."
So Obama's decision to punt to congress on the decision for military action in Syria has a solid Constitutional basis.
So here are the few times Congress has used that power:
After the American revolution there were many unresolved conflicts with Great Britain.
These included trade restrictions brought on by Napoleonic wars, the forced service of American merchant sailors into the Royal Navy and British support of American Indian tribes among others.
On June 17, 1812, Congress approved a resolution declaring war with Great Britain.
The Senate approved the resolution by a vote of 19-13.
