In the second season finale, the Haitian army besieges the American Embassy there and Bartlet continues his campaign to sufficiently fund the Justice Department's case against Big Tobacco. Additionally, Toby gets a surprising job offer and the President gets some sage advice from an unexpected corner.

From TV Guide:
As it happens, a tropical storm is bearing down on Washington on the day the President is to disclose that he has MS and has been lying about it for eight years. Bartlet himself is distracted, but the staffers are, as usual, all business as they deal with Congressional Democrats, party officials and network execs. They also must fashion two responses to the question that is certain to be asked first at his prime-time press conference: Will Bartlet seek reelection?