The judge, Jed S. Rakoff, of Federal District Court, could conduct the inquiry under a rarely invoked authority in which judges are considered supervisors of the grand jury.
Judge Rakoff said he considered examining the situation himself under a rarely invoked authority in which judges are considered supervisors of the grand jury.
But Mr. Obama declined to answer directly, and his administration has ruled out proposals to either invoke authority under the 14th Amendment or mint a platinum coin as a sort of collateral for more debt.
The move, which the F.D.A. announced on Wednesday, represents the first time the agency has invoked authority under a 2007 law that empowered it to order changes in a drug's prescribing information.
While Baghdadi invokes authority as a religious leader, the constant threat from the skies has led to some of its command and strategic decisions being made by other members of the leadership.
The most widely discussed strategy would be for President Obama to invoke authority under the 14th Amendment and essentially order the federal government to keep borrowing, an option that was endorsed by former President Bill Clinton during an earlier debt standoff in 2011.
The agency said it was invoking its authority under the Clean Water Act to rescind the mine's permit from the Army Corps of Engineers, an action it had taken only twice in 40 years and never for a coal mine.
Instead of just listening quietly, Delbanco also speaks assertively to his hypochondriac patients, readily invoking his authority as a physician.
The familiar and the academic conceptions have in common an opposition to invoking the authority of precedents or of abstract and ultimate principles.
The president said he was invoking his authority to put in place his own pay plan in times of a national emergency or serious economic conditions.
When the Portuguese explorer Diogo Cão arrived at the mouth of the Congo River, in 1483, and erected a stele invoking the authority of his king, he encountered a courtly civilization that lacked little in refinement except written language.
