Mark Udall, American educator and politician

Mark Emery Udall is an American politician who served as a United States Senator from Colorado from 2009 to 2015. A member of the Democratic Party, he previously served in the United States House of Representatives, representing Colorado's 2nd congressional district. Before being elected to Congress, he represented parts of Boulder, Colorado, in the Colorado House of Representatives.

July 18 is the 199th day of the year in the Gregorian calendar; 166 days remain until the end of the year.