evidence: Is Rubio right that the population of people living in the U.S. illegally doubled and has reached 20 million to 30 million? [...] Here are immigration groups’ recent estimates of the number of people illegally in the U.S. They issued their estimates from November 2023 to March 2024: [...] Immigration officials don’t let in everyone they encounter, agents have expelled migrants millions of times under Biden. And the number of people living illegally in the U.S. is not static; it fluctuates as people die, leave the U.S. or change their immigration status. Adding the number of border stops under Biden to the estimated number of people already here illegally won’t produce an accurate total.