[bvw]

Even under the Constitution he would so have the authority -- if he believed an attack by Iran on us or our allies was extremely eminent, and that seeking Congressional approval for a formal war declaration was undoable in the time available. That would be a duty, btw, not a judgement call once the determination was made. JMO.

[Jim Noble]

Suppose Bush asked Congress for a Declaration of War against Iran, and it was refused.

Would he still have the authority you claim?