President-elect Joe Biden has nominated former U.N. Ambassador Samantha Power to lead the U.S. Agency for International Development. Biden also said he was elevating that role — USAID Administrator — to be a member of the White House National Security Council. “Samantha Power is a world-renowned voice of conscience and moral clarity — challenging and rallying the international community to stand up for the dignity and humanity of all people,” Biden said in a statement on Wednesday. “I know firsthand the unparalleled knowledge and tireless commitment to principled American engagement she brings to the table, and her expertise and perspective will be essential as our country reasserts its role as a leader on the world stage,” he said. “As USAID Administrator, Ambassador Power will be a powerful force for lifting up the vulnerable, ushering in a new era of human progress and development, and advancing American interests globally.” Power, 50, served in the Obama administration as U.S.