As a Grand Jury convenes to investigate the military-shuttle leak by the White House, the campaign's focus changes to national security.

Josh is surprised when political commentators are critical of Leo as a vice presidential candidate.

As the contest for the Democratic nomination for president narrows, Bartlet tries to devise a way to rescue astronauts trapped in the space station.

The president asks Leo to take charge of the Democratic convention when the organization of the GOP gathering starts to make his party look chaotic.

Vinick wins the nomination and seeks Bruno's counsel on possible vice presidential candidates and how to react to questions about his faith.

President Bartlet must decide whether to continue secret talks with Cuba's ailing dictator and lift an antiquated embargo or to yield to bipartisan political pressure and reaffirm the... Full summary

While campaigning in California, the media pressures Santos (Jimmy Smits) to take a stand on an anti-immigration bill, while Russell (Gary Cole) and Hoynes (Tim Matheson) both dodge the... Full summary

Santos masterminds a plot to get a stem-cell bill passed; a group of middle-school children seeks out Toby to discuss the voting age.

When Sen. Rafferty (Mel Harris) gives an impassioned speech that captures the media's attention, she supplants Vice President Russell (Gary Cole) as the favorite candidate.

Five days before the New Hampshire primary, Josh is desperate to get his candidate into the local newspaper's debate; Santos hires Josh's ex-girlfriend Amy Gardner as an adviser,... Full summary