At the Democratic National Convention in July, the phrase "boycott lettuce" became almost a password. It fell fervently from the lips of any number of heads of delegations, and it was finally consummated as a cause when Ted Kennedy, at the peak of convention excitement, began his speech: "Greetings, fellow lettuce boycotters!"
The idea was to spark a boycott of iceberg lettucethe kind that looks like a head of cabbagein support of Cesar Chavez's two-year-old strike against growers in California. Chavez, grateful for the Democratic boost, believes that the boycott is beginning to take hold and in fact is doing as...