Hmm "Presently, there is no Supreme Court ruling on whether the President has the power to break a treaty without the approval of Congress; it remains unclear which branch of government is empowered by the Constitution to terminate a treaty, much less the procedure for doing so.[38] In practice, a president may terminate a treaty unilaterally if permitted by said treaty's terms.[39] President George W. Bush unilaterally withdrew the United States from the Anti-Ballistic Missile Treaty in 2002, six months after giving the required notice of intent,[40] but faced no judicial interference nor legal action.[39]"