BOSTON (AP) — Sen. Edward M. Kennedy's hospitalization after a seizure stretched to a third day Monday, raising questions about the severity of his illness. The senator's office announced that he is not expected to return to Washington this week, and a spokeswoman said the Massachusetts Democrat had not been available to take a call from President Bush earlier in the day. "Take care of my friend," the president told Vicki Kennedy, who answered the call from the White House to Massachusetts General Hospital, according to Kennedy spokeswoman Stephanie Cutter. There was no word on how long Kennedy, 76, would...