Get a formal declaration of war from Congress. No Presidential work-arounds that have been going on since Truman. Roosevelt was the last President with the fortitude to ask for the support of the nation. He was also the last President to win a war. Note to Obama see how Truman, Johnson, Bush, Clinton, and Bush made out.
They're on vacation Sept. 9th. I don't see them rushing to get back. OTOH, Mr. Peace Prize has said time and again he doesn't need Congress for anything.