After a speech touting the success of a gun control bill, the team learns they are actually five votes short. The fight to get them back puts a strain on Leo's marriage and Josh's relationship with numerous Senators. Toby finds out he may have accidentally participated in insider trading.

A suspect in the presidential shooting is caught; staffers anxiously await news on Bartlet and Josh's injuries; flashbacks show how C.J. and Donna joined Bartlet's campaign.

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.

As results come in across the country, Sam is focused on a single congressional election that will determine his own future. After realizing she accidentally voted for the Republican nominee, Donna tries to find a Ritchie supporter who will "swap votes" with her. The President tries to hide a recurrence of his M.S.

The president, first lady and w.w. staff travel to Orange County, Calif., to campaign for Sam's bid to win the 47th District congressional seat -- the Nov. winner in the heavily Republican district was, amazingly, a liberal Democrat who, more amazingly, had died a few weeks prior. The president orders Toby to fire Sam's campaign manager, a staunch realist, and take over the campaign with a more idealistic approach. Some conservative voters approach Andrea Wyatt in a bar and give her grief about her out-of-wedlock pregnancy, and Toby and Charlie step in forcefully, landing them in jail. Donna talks, on behalf of Sam's campaign, with a state labor leader who turns out to be a Communist.

Trying to participate in a late-night staff poker game proves difficult as news arrives that an unmanned U.S. spy plane has crashed in a remote part of Russia, and Bartlet and Leo have to deal with an incensed Russian President Chagorin and convince him via phone to let the military go in and recover the plane; C.J. obsesses over the fact that on the exact moment of the spring equinox (today), you can stand an egg on end; Toby and Will have a card-flipping contest in the press room, during which someone from the street fires several bullets into the room; Debbie must "crash" the West Wing for the first time when the bullets fly; at the same time, Josh is interviewing associate counsel applicant Joe Quincy, and there's something about the well-qualified lawyer that bothers Josh, which he deduces during the lock down.

A Republican Congresswoman targets Ellie in an attempt to discredit the President; C.J. urges Abby to appear on Sesame Street; Josh works to keep a judicial nominee from withdrawing.

The president and staff are about to head for Brussels to sign an international free trade deal that Josh has just spent a lot of time and effort negotiating, to nearly everyone's satisfaction; at the 11th hour, the CEO of an IBM-like company tells Josh that the first effect of the new agreement, of which his company is a huge beneficiary, will be the immediate transfer of 17,000 programming jobs to India; the head of the communications workers' union, which is representing the affected programmers, brings one of the programmers to Josh's office, and they refuse to leave, leading Josh to question the underlying adverse effects of the trade deal. Throughout the episode, Ryan tries to make Josh care that he's completing his internship that day, while Donna pesters Josh to bring her on the Brussels trip in an effort to make her a more active player in west wing activities, eventually leading to a trade-off that will mean even bigger things for Donna in the long run.

CJ and Abbey go twelve rounds on how to handle President Bartlett and his disease. Lord Marbury makes his return to the White House after a British commercial plane gets shot down by Iran. Toby splits his time between helping write a Belarus constitution and the yearly meeting with Miss World

Hoynes and Russell are campaigning in New York, confident of their prospects in the California primary. Santos needs to do unexpectedly well in California in order to stay financially afloat; another third place finish will see his donors shift their money elsewhere, finishing his campaign. Santos's message of education and health care is overshadowed when California passes a law prohibiting drivers licenses for illegal immigrants. Despite the bill being widely supported by most voters, Matt cannot publicly endorse it as he's counting on the support of Latino voters, who expect him to denounce it.

Senator Arnold Vinick easily wins the Republican nomination on the night of the New Jersey primary, but has difficulty picking a running mate. Choosing Reverend Don Butler would virtually guarantee him the presidency, but their differing views on abortion and religion would make it a political union rather than one based on shared ideology. The Democratic nomination is a toss-up between Santos and Russell; Hoynes is running a distant third. With no clear nominee going into the convention, the Democratic party risks appearing unsure about both Santos and Russell - a position that President Bartlet does not want the Republicans to be able to exploit.

A nuclear accident in California sends the White House and both campaigns into overdrive. Meanwhile, China and Russia appear headed for a showdown over elections and oil in Kazakhstan.

Polls are closing across the country, and the race is too close to call; friends and colleagues react to the news about Leo.