President Joe Biden has nominated Ken Salazar, a former U.S. senator from Colorado, to serve as the next ambassador to Mexico. Salazar, 66, is the former secretary of the interior under President Barack Obama and had served as a Democrat in the U.S. Senate for four years before that. He is currently an attorney at WilmerHale and founder of the firm’s Denver office. Salazar’s nomination will now go to the U.S.