With the possibility of military action against Syria looming, constitutional scholars are debating whether the president must first get approval from Congress to legally launch an attack.

Congress has non-specific authority to “declare war” under Article I, Section 8 of the Constitution. But to John Yoo, a professor at the University of California Berkeley School of Law and prominent conservative, the notion that this means lawmakers must preapprove any attack is “a misinterpretation of the Constitution.”