The claim that 15 million illegals entered the U.S. during the Biden administration is false, by many accounts. One, "illegal" is not an accurate term for an immigrant who came to the U.S. without documentation. "Undocumented" is a more accurate term, as being undocumented in the United States is a civil offense, not a criminal one (the same level of severity as jaywalking). People who say "illegals" are usually trying to dehumanize these people who are usually just trying to seek asylum and find a better life for their families. Two, according to fact checker website (Fact Check: Did 20 Million Illegal Immigrants Enter US Under Joe Biden? - Newsweek), many high-profile Republicans claimed that 20 million immigrants entered the country under the Biden administration. These claims are made to disparage former president Joe Biden, as well as justify the recent ICE activity in the country. However, these claims aren't true. The number 20 million comes from the amount of "encounters" border patrol agents had with unauthorized border crossings. Encounters do not mean that these people actually made the crossing, and in fact most of the time they're turned back around. So, the claim "15 million illegals entered the U.S. during the Biden administration" is untrue.