BARTLET PONDERS BREACHING LAW TO NAB TERRORIST; MARK HARMON GUEST-STARS -- The President is torn over forfeiting the principle of diplomatic immunity for an important Middle Eastern official known to be plotting terrorism while Josh duels with his feminist activist/lover (guest star Mary Louise Parker) over a key welfare reform bill. Elsewhere: Bartlet is advised not to attend a politically sensitive fundraiser; a chastened Sam nixes ecology-friendly legislation for the Everglades; C.J. gains new respect for her Secret Service bodyguard (guest star Mark Harmon); Donna is dispatched to North Dakota to represent the administration at a meeting to change the state's name.