By Carol E. Lee and Jay Solomon

President Barack Obama will meet with the crown prince of Bahrain at the White House on Tuesday, an administration official said. But in a show of how delicate relations with the U.S. ally have become, the sit-down is not officially on the president’s schedule.

Instead Mr. Obama will “drop by” a meeting that Crown Prince Salman bin Hamad bin Isa al-Khalifa has Tuesday afternoon with National Security Advisor Tom Donilon, the administration official said.