 He served as the Senate Minority Caucus Chairman from 2013 until his promotion to Senate Minority Whip in 2017.Prior to his service in the Senate, he served 1.5 terms in the Wyoming House of Representatives from 2003 through January 2007.Hastert was originally appointed by the Sweetwater County Commission to fill the vacant seat left by former majority leader Democrat Chris Boswell, who left office to become newly elected Governor Dave Freudenthal's chief-of-staff.