Poll: Clinton, Trump on top before Missouri primary

Donald Trump, Hillary Clinton
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Democrat Hillary ClintonHillary Rodham ClintonTrump on debate: I was 'holding back' Mark Mellman: Debating the debate Team Trump: Debate won’t move needle in race for White House MORE and Republican Donald TrumpDonald TrumpTrump on debate: I was 'holding back' Mark Mellman: Debating the debate Team Trump: Debate won’t move needle in race for White House MORE lead their respective presidential rivals in Missouri three days before voters cast ballots there, according to a new poll.

Clinton leads Bernie SandersBernie SandersSenate Dems: Don't leave for break without Supreme Court vote Sanders: Young voters will 'come on board' Clinton's campaign The Trail 2016: The fallout MORE, 47 percent to his 40 percent, according to a survey by the Docking Institute of Public Affairs Poll at Fort Hays State University in Kansas, first reported by the The St. Louis Post-Dispatch.

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Another 13 percent of Missouri’s Democrats remain undecided between Sanders and the Democratic presidential front-runner, it found.

Trump, meanwhile, leads the Republican field by 7 points in the Show Me State, according to Friday’s poll.

He takes 36 percent, followed by Ted CruzTed CruzFunding bill rejected as shutdown nears Cruz: Clinton 'tired' and 'formulaic' during debate The Trail 2016: Fight night MORE, at 29 percent, Marco RubioMarco RubioObama nominates ambassador to Cuba Rubio praises Marlins pitcher José Fernández on Senate floor Glenn Beck: I was wrong about Ted Cruz MORE, at 9 percent, and John Kasich at 8 percent. Another 17 percent remain undecided ahead of Tuesday's vote.

The Docking Institute conducted its latest sampling of 483 Missourians March 3–10. It has a 7 percentage point margin of error for Republicans and an 8-point margin of error for Democrats.

Friday’s results show both contests are up for grabs, as both show candidates within the margins of error.

Missouri awards 52 GOP delegates proportionally unless a candidate gets more than 50 percent of votes statewide. Should that happen, it is winner-take-all.

Democrats, meanwhile, pick 71 out of 84 Missouri delegates on March 15. The remaining 13 are superdelegates, most of whom are backing Clinton.

Missouri is one of five states voting that day, with Florida, Illinois, North Carolina and Ohio also casting ballots.

Trump leads the Republican field by more than 14 points nationwide, according to the latest RealClearPolitics average of polls. Clinton, meanwhile, holds a roughly 11-point edge over Sanders in the Democratic nomination contest.