Sadly, the claim is correct. Brookings, a very reputable non-profit with a focus on governance and research, made the statement. To support their claims, the writers only cite primary sources, including government records and other research and polls.
The Supreme Court's decision in Noem v. Vasquez Perdomo is a significant document that is mentioned in the article. The Court affirms that "their apparent race or ethnicity, whether they spoke Spanish or English with an accent, the type of location at which they were found, and the type of job where they appeared to work" could be used to determine whether someone is a person of interest (Noem v. Perdomo). ICE officials were urged to make arrests if there was a possibility that the individual they were holding was a citizen, according to a dissenting judge.
Furthermore, the difference between nationalities was evident right away while accessing the official ICE website. A map under the "U.S. Immigrations and Customs Enforcement Removals Statistics" section shows the nations from where the bulk of people deported as of May 2025 originated. More than 200,000 of these removals occur in Mexico, with Guatemala, Honduras, and numerous other South American nations following.
https://www.supremecourt.gov/opinions/24pdf/25a169_5h25.pdf
https://www.ice.gov/statistics