In the Matter of M-J-K-, 26 I&N Dec. 773 (BIA 2016), the Board of Immigration Appeals (BIA) held that an immigration judge has the discretion to select and implement appropriate safeguards in immigration proceedings when there are issues involving the mental competency of the alien. The BIA may review this de novo.

Inadmissibility and Deportability By Secretary of State Determination
A determination by the Secretary of State that the admission or continued presence of an alien in the United States would or will have adverse foreign policy consequences may render the alien inadmissible or deportable.