Police Commissioner James O’Neill had a defiant message for the President on Wednesday — saying his officers will not enforce administrative warrants issued by federal immigration officials as a result of the expansive deportation policies.

“It is critical that everyone who comes into contact with the NYPD, regardless of their immigration status, be able to identify themselves or seek assistance without hesitation, anxiety or fear,” O’Neill said in the sharply worded, 431-word internal memo to police officers.

“The NYPD does not conduct civil immigration enforcement. Specifically, this department does not enforce administrative warrants issued by Immigration and Customs Enforcement agents or federal immigration judges solely in connection with civil immigration violations.