For the first six months after his presidential defeat, Richard M. Nixon remained politically silent, resting up after the exhausting campaign and re-establishing himself as a California lawyer. But last week Republican Nixon returned to the political platform, beginning a four-day series of speeches in four states. His first talk, before Chicago's Executives' Club, was one of the most eloquent and effective of Nixon's political life, staking out a. badly needed Republican foreign policy position relative to the messes in Cuba and Laos. Excerpts:
"My first speech on national issues since the election presents a difficult problem. The trouble is...