Trump won the state with 51.15% of the vote, while Clinton received 41.74% (a margin of 9.41%). Clinton's performance in Iowa was the worst performance for a Democratic presidential candidate since 1980. Trump, besides being the first Republican to carry the state since George W. Bush in 2004, won over a dozen counties that had not voted Republican since Ronald Reagan was on the ticket; won two counties that had last voted Republican in Richard Nixon's landslide victory in 1972; and also won Dubuque County, which had last voted Republican in 1956.[2] Trump carried Iowa by the largest margin of any Republican candidate since Reagan in 1980, and he was the first Republican to win an outright majority of the state's vote since Reagan's historic 1984 landslide. Trump enjoyed the support of working-class whites in the agricultural industry, as well as the endorsement of Iowa's GOP establishment.[3][4]