 In 1996, Dayton was appointed by Utah governor Mike Leavitt to fill out the remaining four months of the term of Rep. Lee Ellertson in Utah House District 61, a seat for which she was already running.She defeated Independent American Party candidate Gordon Norman with 90% of the vote in the election to retain the seat.In 2006, Dayton ousted Republican incumbent Parley G. Hellewell to win the Republican nomination for the Utah Senate, and handily defeated Democrat Bethanie Newby in the November 2006 general election.