CLAIM: President Joe Biden said in his 2021 speech to Congress, “Immigration has always been essential to America.” VERDICT: FALSE. The United States won World War II, created a middle-class economy, invented many new technologies, revived racial equality, and landed astronauts on the moon during the long period of low migration between 1925 and 1970. [...] In 1955, pro-migration groups began claiming the United States was a “Nation of Immigrants,” but immigrants were only 7 percent of the population in 1955, down from 15 percent in 1910. New arrivals slowly rose amid the Cold War as Congress welcomed people fleeing...