Jack Kennedy had seen crowds before.
Nearly a million people cheered his entry into Paris to visit France's Charles de Gaulle; 300,000 were on hand when he arrived in London; another 1,000,000 lined the streets of Bogota, Colombia, when he traveled south last year. And he got some massive turnouts in Manhattan during his 1960 campaigning. Last week Kennedy's orange-nosed Air Force jet carried him across the U.S. border for a three-day visit to President Adolfo Lopez Mateos and the fiercely independent, sometimes cantankerous southern neighbor, Mexico.
But if there was as much anti-gringoism in Mexico as people say, the U.S. President...