While a contemptuous Toby is assigned to meet with a noisy, unruly mob protesting the World Trade Organization, Donna asks Sam to consider fronting an executive pardon for the grandfather of her friend who was imprisoned for espionage in the 1940s. Elsewhere, President Bartlet fumes when there are complications in his plan to select the bucolic — and historic — site for his Presidential library; as part of Bartlet’s tradition of setting aside one day for personal petitions to the White House, C.J. must grant an audience to an earnest group of cartographers who want to adopt a new global map that is more respectful of Third World nations; Sam is still smarting over the news of his father’s infidelity.

From TV Guide:
It’s “Big Block of Cheese” Day, which means that Leo sends grumbling staffers to meet with organizations who are not usually heard from at the White House. Toby, for instance, meets with World Bank protesters while C.J.’s assignment is the Cartographers for Social Equality. Meanwhile, a friend of Donna’s asks Sam to pursue a pardon for her grandfather, a White House staffer in the ’40s who was convicted of perjury in a McCarthy-era spy case and died in prison.