President Barack Obama listens as Hartford “Sonny” Black Eagle delivers remarks at the White House Tribal Nations Conference at the Interior Department in Washington. Native American tribal leaders are concerned that steady progress on their issues might be undermined if President Barack Obama and Congress make deep spending cuts in order to avoid the “fiscal cliff.” More than 500 tribal leaders were taking those concerns to the fourth White House Tribal Nations summit, which convenes Wednesday, Dec. 5, 2012. Obama is scheduled to address the group in the afternoon.