MIAMI — Marco Rubio’s grandfather was a man without a country.

Pedro Victor Garcia had left behind a home and a job with the government in communist Cuba, intent on never returning. But after his flight, Pan Am 2422 from Havana, touched down in Miami on Aug. 31, 1962, immigration officials stopped him.

It had been almost three years since he had last set foot in the United States, and he no longer had the proper credentials to enter. They told him he could stay for the time being, but if he wanted to avoid deportation, he would have to plead his case.

“I always thought of being here in the United States as a resident, living permanently here,” the slight 62-year-old grandfather, speaking through an interpreter, said at a hearing five weeks later. He said that he had previously returned to Cuba because he did not want to be a burden on his family in the United States, but that the Cuban government had grown too oppressive and he feared what might happen if he stayed.

The immigration officer was unmoved. He did not see an exiled family man — just someone who had no visa, worked for the Castro government and could pose a security risk.