While the W.H. is hosting a gala dinner for Nobel Prize winners, Leo and the president learn of a suicide bomb in an Israeli cafe that took the lives of two American students in Tel Aviv for a soccer match, and the staff attempts to manage the president's first veto, of a House bill eliminating the estate tax, and the threat of an override the same night. Sam and Toby first try to sway a contentious Dem. From Tennessee who wants a whole list of farming and ranching concessions in exchange for his vote and three proxies; after a pep talk from Leo, they devise a substitute plan that may prove even more effective, if it works. Josh takes the governor of Indiana into a private meeting to determine if the man plans to challenge Bartlet in Democratic primary. C.J. takes heat from a smarmy Dallas entertainment reporter who is in town for the Nobel dinner but winds up having to cover the veto and override vote, but after the reporter embarrasses her during a live stand-up, C.J. one ups the woman in front of the press corps. Later, Sam, Toby and Josh try to help the president decide what to say to the parents of the two murdered students.

A small town in N.H. is the site of the first presidential primary vote, and the results from Hartsfield's Landing, announced at 12:07 a.m., will dominate the news all day until the final tally. Josh wants favorable press for the president, prompting him to ask Donna to persuade a local couple she knows to reconsider their vote. Elsewhere, Bartlet has just returned from India with a collection of antique chess sets he gives as gifts to the staff. He plays Toby while they discuss their recent blow-up, Bartlet's insomnia and Toby's fervent belief that the president's enormous intellectual gravitas is an asset, not a liability, to the campaign. He also plays Sam as they discuss a critical detente standoff between China and Taiwan. And Charlie and C.J. stand off in a series of pranks over a missing copy of the president's private schedule.

The President and Leo deal with reports of a planned terrorist attack, but more shocking is who is behind it. Sam receives an anonymous package with bad implications for the campaign. C.J. chafes under her Secret Service protection.

Bartlet and Leo debate on how to deal with the impending visit of the Qumari Defense Minister, whom U.S. intelligence officers have conclusively linked to terrorists. Sam dismisses an ingenious idea to trap Republican presidential opponent Robert Ritchie in an unsavory position over the Everglades, but comes around after talking to Toby. C.J. begins to develop a relationship with Secret Service agent assigned to her, Simon Donovan. Josh and Amy are locked into a battle over a welfare reform bill, which could end their relationship.

Bartlet, Leo, Sam, Toby, and C.J. travel to New York City for a Catholic fund raiser at a long Broadway play called "The War of the Roses". Josh steps up his efforts to beat his girlfriend, Amy, in their struggle over the welfare reform bill, which leads to her forced resignation. C.J. and Secret Service agent Simon Donavon have grown closer, but a tragic event cuts short their relationship. At the play, Bartlet comes face to face with Republican Presidential candidate Rob Ritchie and faces the decision of whether or not to assassinate the Qumari Defense Minister.

Josh and Toby have a plan to make college cheaper. Leo starts talking to a lawyer about the Shareef assassination. A judicial ruling on third-party candidates has troubling implications for the campaign.

Sequestered in North Carolina to prepare for the one and only debate between Bartlet and opponent Robert Richie, the staff and several consultants (incl. Andrea Wyatt and Joey Lucas) flash back to the days just before and after the president's first inauguration, which were marked by an ill-advised choice for attorney general and ongoing concerns about fertility for then-married Toby and Andrea. In the present, Sam plays Richie in mock debates and raises Bartlet's ire, while Leo and the joint chiefs try to convince the president not to treat increasingly aggressive Qu'mar, whose defense minister Bartlet ordered assassinated (late last season), with kid gloves, and the staff keeps pestering Toby about his on-again, off-again relationship with Andrea, until he makes a startling revelation.

Sam finds himself in a tricky position after the election in Orange County takes an unexpected turn. Toby and his ex-wife also find themselves in a delicate position, but decidedly one of their own making. And CJ tracks down the self aggrandizing source of some Process Stories.

It is the day of Bartlet's second inauguration and yet the celebrations stutter as the staff are stunned by a betrayal in their midst.

Military action in Africa has unforeseen repercussions. Sam and Toby work together on the Orange County Campaign. Will has to find his leadership skills quickly as he is left with no one but interns to prepare remarks on the dry subjects of Taxes.

Seven hours have passed since Zoey's kidnapping and and the Republicans are in charge of the White House. Rifts are appearing in the leadership of both parties further complicated by the arrival of a ransom note demanding the release of terrorists.

A nuclear device is tested in the Indian Ocean, but none of the known nuclear powers will claim responsibility, leading to the possibility of a terrorist group holding missile tests. Vice President Russell, heretofore dismissed by west wing staff as a joke, a four-term congressman alleged to be securely in the pocket of a large Colorado mining company, recalls a junket he'd taken early in his political career in which a drunken Israeli statesman confessed to secret missile tests. Russell visits the sit. room and puts the military and national security leaders at ease, leading the president and Leo to reassess the man's political gravitas. Bartlet then drags the Israeli p.m. to the White House, where they debate the power of the U.S. to dictate which states should have nuclear capabilities.

The Santos campaign faces questions on intelligent design and evolution during a campaign stop focusing on education in Pennsylvania. Margaret testifies before the committee investigating the leak, which has also served most current and former members of the Bartlet administration with subpoenas. A suicide bombing in the Middle East throws the region into chaos and threatens to postpone all campaigning. An intelligence analyst assigned to brief the Vinick campaign demands to speak with CJ.

Toby's confession sends shock waves through the White House; Kate tracks developments following the assassination in Kazakhstan; the Santos campaign appears stalled.