Politics: Mac v. Mo

When Stewart L. Udall became Secretary of the Interior in January, he gave up his job as Representative from Arizona's Second District—a district that includes the whole state except the Phoenix area and has a history of hard-riding political warfare. Last week, as national leaders of both parties watched closely, the two candidates for Udall's old seat began stepping up their campaigns for next month's election. The rivals: Republican Businessman Mac C. Matheson, 43, a smooth-speaking conservative, and Democratic Lawyer Morris K. ("Mo") Udall, 38, one of Stew's kid brothers.

Running Scared. At...