WASHINGTON (CNN) -- A top House Democrat called for a swift U.S. withdrawal from Iraq on Thursday amid a White House counteroffensive against allegations that the Bush administration misled the country over prewar intelligence. CNN anchor Wolf Blitzer spoke with Sen. John Kerry -- the Massachusetts Democrat who lost to President Bush in last year's election -- beginning by asking about the president recently quoting Kerry's prewar comments on Saddam Hussein. "I believe that a deadly arsenal of weapons of mass destruction in his hands is a threat, and a grave threat, to our security," the president quoted Kerry saying,...