MANCHESTER, N.H. — Bill and Hillary Rodham Clinton have been in career-threatening scrapes before, but never quite like the one they face in the New Hampshire primary on Tuesday, when nothing less than their would-be dynasty will be on the line. In trying to battle back from her loss in the Iowa caucuses to Senator Barack Obama of Illinois, Mrs. Clinton is recalibrating her message in hopes of producing Comeback Kid: The Sequel — achieving the reversal of fortune her husband pulled off with his second-place finish here in the Democratic nomination contest in 1992. Mrs. Clinton, after arriving here...
