President Obama did it again. Despite being head of state of the most powerful nation on the planet, he bent over to give a bow to the leader of a lesser country. Mr. Obama’s latest show of fealty was to Mexican President Felipe Calderon at the G20 Leaders Summit in Los Cabos, Mexico, on Monday. His repeated bowing to foreign politicians is conduct unbecoming a president of the United States. The ostensible leader of the free world should not bow to anyone.