Complex sentence: He was nominated in August 2012 by President Barack Obama to become Assistant Secretary of Indian Affairs at the U.S. Department of the Interior and his nomination was unanimously confirmed by the Senate on September 21,2012.
Split into simpler sentences: He was nominated in August 2012 by President Barack Obama to become Assistant Secretary of Indian Affairs at the U.S. Department of the Interior. His nomination was unanimously confirmed by the Senate on September 21,2012.