Decrying the "president's deportation machine," and even hinting that the White House could deport all 11 million illegals and even green card holders, a new Harvard Law School report is urging major legal changes in so-called "sanctuary cities" to help aliens elude deportation.

The report warns of "mass deportations" and makes several recommendations to shield illegals including decriminalizing small crimes, ending "all local collusion" with Immigration and Customs Enforcement, and even banning police from public schools that illegal immigrants attend.

"It is inspiring that many cities, from Portland to New York, have local leaders who have boldly declared their cities to be 'sanctuary' cities, but unless these leaders work to mitigate the risk that harsh criminal justice policies impose on all citizens, especially immigrants, the promise of sanctuary will be meaningless," said Jessica Brand, legal director for the Harvard backed Fair Punishment Project.

The 35-page report, The Promise of Sanctuary Cities and the Need for Criminal Justice Reforms in an Era of Mass Deportation, warns that there are too many ways for ICE to find out that sanctuary cities have arrested or are holding illegals for simple crimes that could trigger deportation.

"Because of the way federal immigration law and deportation policies are entangled with the criminal justice system, cities that strive to be safe spaces often have criminal justice systems that feed the president's deportation machine," it warned.

For example, it says that New York police book those who jump subway turnstiles, and that information — including fingerprints — is shared with the federal government and could lead to a deportation despite the city's sanctuary policies.

And in public schools, it warns that local police and sheriffs there to protect students are called on to make arrests for fights or drugs and that information is put into crime data bases that could lead to deportation.

Police should be barred from schools, said the report: "Their presence has contributed to the over-policing of young people, and for immigrant youth, it can create the school-to-prison-to-deportation pipeline."

The report, also written the Immigrant Defense Project and Immigrant Legal Resource Center, raises the specter of mass deportations, ignoring repeated statements from the administration it is not engaged in sweeping deportation campaigns.

However it is targeting criminal illegals, as did the Obama administration.

Nonetheless, the report warns that all illegals are being targeted.

It said that President Trump's immigration executive orders are a "mandate to use the criminal justice system to deport as many of the estimated 11 million undocumented people as possible, in addition to green card holders and those living here with lawful status who have even minor criminal records."

Paul Bedard, the Washington Examiner's "Washington Secrets" columnist, can be contacted at pbedard@washingtonexaminer.com