Stung by criticism, Senator Obama veers away with hard rudder from his statement he’d meet with Ahmadinejad: Hedging his much-discussed offer to meet personally with President Mahmoud Ahmadinejad — now the encounter would be with “the appropriate Iranian leader at a time and place of my choosing, if and only if, it can advance the interests of the United States†— Mr. Obama fully embraced the Bush administration’s view that “the danger from Iran is grave.†He said “we will use all elements of American power to pressure Iran,†and he pledged, “I will do everything in my power to...