On March 8, 2016, in the presidential primaries, Mississippi voters expressed their preferences for the Democratic, and Republican, parties' respective nominees for president. Registered members of each party only voted in their party's primary, while voters who were unaffiliated chose any one primary in which to vote.
Mississippi has not voted Democratic since 1976. Since that time, Republicans have dominated the state's political elections, and so Trump was widely expected to win the election. Donald Trump won the election in Mississippi with 57.9% of the vote. Hillary Clinton received 40.1% of the vote. Trump's 17.8% margin of victory proved to be a 6.8% increase over the 11.5% margin of victory by which Republican nominee Mitt Romney won the state over Barack Obama in 2012.