President Clinton's new presidential library, which is being dedicated at a gala ceremony today, has already triggered a politically charged battle over whether the museum's exhibits present a skewed view of history. The $165 million facility opened yesterday for brief tours by members of the press. Reporters quickly noted that the exhibits present Mr. Clinton in a uniformly flattering light, while omitting or downplaying facts that the former president and his allies might view as inconvenient. At several points, the museum's displays also disparage Mr. Clinton's political adversaries. An alcove entitled "The Fight for Power" depicts Mr. Clinton's impeachment as...