EL PASO, Texas (Border Report) -- The America First Legal Foundation, the conservative public interest organization, has put what it calls "sanctuary jurisdictions" on notice. AFL, which President Donald Trump's former senior adviser Stephen Miller founded in 2021, said it notified 249 elected officials of the legal consequences they could face for interfering with or impeding federal immigration law enforcement and for concealing, harboring, or shielding undocumented immigrants. President-elect Trump recently named Miller as deputy White House chief of staff. AFL's notice letters also warn that consequences are not limited to public officials, but to "any person who violates these laws." New LAPD chief says he will work to protect immigrants ahead of Trump’s plans for mass deportations Among the recipients is Jim McDonnell, the Los Angeles chief of police, who recently said his department is working with consulate offices for Mexico and other Central American countries to draft a plan to protect immigrants from the Trump administration's plans for mass deportations. Los Angeles Police Department Chief Jim McDonnell stands for a photo after an interview with The Associated Press in Los Angeles, Wednesday, Dec. 4, 2024. (AP Photo/Jae C. Hong) Other recipients include the mayors of Los Angeles, New York, Denver, Chicago, Boston, Washington, D.C., Baltimore, Atlanta, and New Orleans, and each of those letters roughly say, "We have identified your jurisdiction as a sanctuary jurisdiction that is violating federal law." But the mayors of smaller cities, like Eric Enriquez of Las Cruces, New Mexico, also received a letter, as did a handful of county managers, including Doña Ana County, which is home to Las Cruces, and Chaves County, which is home to Roswell, New Mexico. Citing ‘personal safety and security’ head of San Diego County board resigns Former San Diego County Board of Supervisors Chair Nora Vargas also received a notice. She recently won re-election, but just announced her resignation, citing "personal safety and security" as determining factors. On Dec. 10, Vargas led an effort to prevent the use of county resources and funding to assist federal immigration agents with deportations. The Board voted 3-1 in favor of the measure to restrict the use of its jails, county buildings, and personnel to help agents with federal immigration enforcement. Vargas has not revealed the nature of the threats, and her office has declined to give further details. Migrants linger on border as Mexico crackdown continues, Trump deportations loom The notices begin by stating that the federal government has "ultimate authority over immigration." "Federal law is clear," the letter begins. "Aliens unlawfully present in the United States are subject to removal from the country, and it is a crime to conceal, harbor, or shield them. It is also a crime to prevent federal officials from enforcing immigration law. These laws were duly enacted by the people’s elected representatives. Under the Supremacy Clause of the U.S. Constitution, they are the law of the land and supersede any State or local laws to the contrary. In our democratic republic, all State and local officials must comply with them." In the letter to McDonnell, for example, AFL writes: "We have identified Los Angeles as a sanctuary jurisdiction that is violating federal law. In fact, as Los Angeles Chief of Police, you have clearly stated your support for the city to ignore federal law, stating on November 8, 2024, that the LAPD, 'will not cooperate with mass deportations,' thereby stating your intent to blatantly violate federal immigration law. Such lawlessness subjects you and your subordinates to significant risk of criminal and civil liability. Accordingly, we are sending this letter to put you on notice of this risk and insist that you comply with our nation's laws." In an interview with the Associated Press, McDonnell said the LAPD does not stop people or take action for any reason related to immigration status, and it doesn't enforce immigration laws. In a news release, AFL said the letters are part of the initial phase of its response to elected officials and organizations who have announced plans to decline to cooperate with federal immigration officials. Other parts of the initial phases include an interactive website resource called "Sanctuary Strongholds" that provides the contact information of elected officials accused of violating federal law, and a petition with the Department of Justice Office on Violence Against Women asking it to publicly report the citizenship status and nationality of every person charged with child maltreatment, dating violence, domestic violence, female genital mutilation or cutting, sexual assault, stalking, and/or technological abuse, murder, and/or other violent incidents committed against a minor or adult." To read the letters, click here.