Poll: Clinton leads Trump in Missouri
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Hillary ClintonHillary Diane Rodham ClintonSanders expected to announce exploratory committee next week Bernie Sanders records announcement video ahead of possible 2020 bid Overnight Defense: Trump declares border emergency | .6B in military construction funds to be used for wall | Trump believes Obama would have started war with North Korea | Pentagon delivers aid for Venezuelan migrants MORE holds a slim lead over Donald TrumpDonald John TrumpGillibrand backs federal classification of third gender: report Former Carter pollster, Bannon ally Patrick Caddell dies at 68 Heather Nauert withdraws her name from consideration for UN Ambassador job MORE in their presidential race in Missouri based on a new poll published Friday, according to The Kansas City Star.

Clinton leads Trump 42 to 40 percent in the DFM Research of Minnesota poll conducted on behalf of the United Transportation Union. The lead is within the poll's 3.8 percent margin of error.

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But the poll could be a troubling sign for Republicans who have taken Missouri in seven of the last nine presidential elections. The two exceptions are when the state went for Bill ClintonWilliam (Bill) Jefferson ClintonFor 2020, Democrats are lookin’ for somebody to love A year since Parkland: we have a solution Washington restaurant celebrates holiday with presidential drinks MORE in 1992 and 1996.

Hillary Clinton edged out a victory in the Democratic primary March 15, taking 49.6 percent of the vote to Bernie SandersBernard (Bernie) SandersSanders expected to announce exploratory committee next week Bernie Sanders records announcement video ahead of possible 2020 bid Bill Maher to Dems: ‘Let’s not eat our own’ in 2020 MORE's 49.4 percent. Trump also won narrowly, besting GOP rival Ted CruzRafael (Ted) Edward CruzPoll shows competitive matchup if O’Rourke ran for Senate again Democrats veer left as Trump cements hold on Republicans O’Rourke heading to Wisconsin amid 2020 speculation MORE 40.9 to 40.7 percent.

The survey also finds incumbent Sen. Roy BluntRoy Dean Blunt‘Contingency’ spending in 3B budget deal comes under fire GOP braces for Trump's emergency declaration The border deal: What made it in, what got left out MORE (R) leading Democratic Secretary of State Jason Kander (D) 49 to 35 percent. But adding to Republican worries, 40 percent of those surveyed had never heard of Blunt's Democratic challenger.

A separate poll from Remington Research for Missouri Scout had Blunt leading Kander 44 percent to 37 percent, according to the Star.

The pollsters did not share their sample size or if the respondents were registered voters.