But Romney's rivals will pounce on his response when asked whether a US president should request authorization from Congress before launching a military strike at any future Iran nuclear weapons plant. "You sit down with your attorneys and tell you want you have to do" he said, before adding the president always had to act in the best interest of the United States.
This is what GWB had to do before he acted!
September 25, 2001
MEMORANDUM OPINION FOR THE DEPUTY COUNSEL TO THE PRESIDENT
You have asked for our opinion as to the scope of the President’s authority to take military action in response to the terrorist attacks on the United States on September 11, 2001. We conclude that the President has broad constitutional power to use military force. Congress has acknowledged this inherent executive power in both the War Powers Resolution, Pub. L. No. 93-148, 87 Stat. 555 (1973), codified at 50 U.S.C. §§ 1541-1548 (the “WPR”), and in the Joint Resolution passed by Congress on September 14, 2001, Pub. L. No. 107-40, 115 Stat. 224 (2001). Further, the President has the constitutional power not only to retaliate against any person, organization, or State suspected of involvement in terrorist attacks on the United States, but also against foreign States suspected of harboring or supporting such organizations. Finally, the President may deploy military force preemptively against terrorist organizations or the States that harbor or support them, whether or not they can be linked to the specific terrorist incidents of September 11.
http://www.usdoj.gov/olc/warpowers925.htm