In 1972 Arizona passed a law that denied farmworkers “the right to strike and boycott during harvest seasons.” Cesar Chavez began a fast in protest at Santa Rita Hall in Phoenix. Local Latino leaders told Dolores Huerta: “No, aqui en Arizona, no se puede,” meaning no, here in Arizona it can’t be done. She answered: “Si se puede en Arizona.” Huerta recalled: “Everybody stood up and they started clapping ‘Si Se Puede.'”
The phrase became the rallying cry of the farmworkers’ campaign in Arizona. On January 8, 2008, Barack Obama came in second in the New Hampshire primary. That night he said: “when we’ve been told we’re not ready or that we shouldn’t try or that we can’t, generations of Americans have responded with a simple creed that sums up the spirit of a people: Yes we can.”