evidence: The Republican presidential nominee has repeatedly criticised the government's record on the border, saying "Kamala Harris has allowed 21 million illegals to pour in from all over the world." [...] US border officials record "encounters" with migrants - these include people who attempted to cross illegally and people who tried to enter legally but were deemed inadmissible. [...] The US Department of Homeland Security has estimated there were 11 million illegal migrants living in the US as of January 2022.