A US immigration judge has ruled that the leader of Wisconsin's largest mosque can be deported from the United States on foreign policy grounds, WBAY reports.

The ruling marks one of the most prominent applications of a rarely used justification in American immigration enforcement: removal justified not by a criminal conviction or visa violation, but by the government's assertion that a person's presence conflicts with US foreign policy interests.

Who does the ruling affect?

The decision concerns a single individual: the head of the largest mosque in the state of Wisconsin. According to WBAY's report, the judge found that deportation on foreign policy grounds is legally available in his case.

The case does not create a new blanket policy. It applies to one respondent in immigration court. However, it signals that federal authorities are willing to pursue foreign-policy-based removal arguments against Muslim community leaders, a development civil rights organisations have watched closely in similar proceedings elsewhere in the United States.

What does the ruling change?

An immigration judge's deportation order does not take effect immediately in most cases. The affected individual can appeal, and appeals of immigration court decisions typically go to the Board of Immigration Appeals (BIA). Only after appeals are exhausted can removal proceed.

For the mosque leader, the ruling converts his immigration status from pending-respondent to deportable under the judge's finding. His legal options now narrow to the appellate track.

Foreign policy grounds for removal rest on the executive branch's broad authority over external affairs. Judges in such cases generally give substantial weight to the government's position on whether a person's continued presence harms US foreign policy interests, which makes these cases difficult for respondents to win.

Why does the reasoning matter?

Deportation on foreign policy grounds differs from the most common removal bases:

• Criminal convictions
• Visa overstays or status violations
• Misrepresentation in immigration applications
• National security charges requiring evidence of specific activity

In a foreign-policy case, the government does not need to prove a crime. It argues instead that allowing the person to remain damages the country's diplomatic or external interests. Critics of this approach say it permits removal based on speech, association or political opinion rather than proven wrongdoing.

Supporters of the doctrine argue the executive must retain flexibility to remove individuals whose presence complicates relations with other states.

What happens next?

The ruling opens an appeal window. The mosque leader's defence can challenge the deportation order before the BIA and, if necessary, in federal circuit court. During that process, removal is generally stayed.

The case will be watched as a test of how far the foreign policy rationale can stretch in immigration court — and whether leading a large religious community in the United States can itself become entangled with the government's external affairs arguments.

Immigration officials and the court have not announced a removal date, and further hearings will follow the appellate timeline.

This article summarises publicly reported developments. It does not constitute legal advice. Readers with immigration questions should consult a licensed immigration attorney or official US government sources, including the Executive Office for Immigration Review and US Citizenship and Immigration Services.