A bittersweet farewell to Frank M. Reid at Bethel AME

Samantha Power

Holding the national security course

Holding the national security course

President Barack Obama's latest changes in his top national security team seem more a shift to a stronger emphasis on human rights than a break with his long-range determination to keep the United States out of nation-building adventurism.

His appointments of UN Ambassador Susan Rice as national security adviser and of Samantha Power, a persuasive insider human rights advocate from the National Security Council, to replace Rice at the UN suggest that shift rather than any momentous pivot.

"I think everyone understands that Susan is a fierce champion for justice and human dignity," Mr. Obama said in announcing the first appointment, "but she's also mindful that...