Michael Farrand Bennet is an American attorney, businessman, and politician serving as the senior United States senator from Colorado, a seat he has held since 2009. A member of the Democratic Party, he was appointed to the seat when Senator Ken Salazar became Secretary of the Interior. Bennet previously worked as a managing director for the Anschutz Investment Company, chief of staff to Denver mayor John Hickenlooper, and superintendent of Denver Public Schools.

Kenneth Lee Salazar is an American lawyer, politician, and diplomat who is the United States ambassador to Mexico. He previously served as the 50th United States Secretary of the Interior in the administration of President Barack Obama from 2009 to 2013. A member of the Democratic Party, he previously was a United States Senator from Colorado from 2005 to 2009. He and Mel Martínez (R-Florida) were the first Hispanic U.S. senators since 1977; they were joined by Bob Menendez in 2006. Prior to his election to the U.S. Senate, he served as Attorney General of Colorado from 1999 to 2005.