US can deport the leader of Wisconsin’s largest mosque on national security grounds, judge rules. CHICAGO: The US can deport the leader of Wisconsin’s largest mosque — an outspoken advocate of Palestinian rights — on the grounds that he is a threat to national security, an immigration judge ruled Wednesday. Salah Sarsour was detained in Milwaukee in March by US Immigration and Customs Enforcement officers. A federal judge ordered Sarsour’s release in June, saying he.