Poll: Trump trails three Democrats by 10 points in Colorado

A new poll finds President TrumpDonald John TrumpHarris bashes Kavanaugh's 'sham' nomination process, calls for his impeachment after sexual misconduct allegation Celebrating 'Hispanic Heritage Month' in the Age of Trump Let's not play Charlie Brown to Iran's Lucy MORE trailing three Democratic White House hopefuls by 10 points in Colorado, a purple state with a competitive Senate race that has trended blue in recent elections.

The latest Emerson College survey finds former Vice President Joe BidenJoe BidenBiden bemoans white supremacy in remarks at civil rights movement site Gun control: Campaigning vs. legislating Sunday shows - Guns dominate after Democratic debate MORE, Sen. Bernie SandersBernie SandersGun control: Campaigning vs. legislating Booker defends middle-ground health care approach: 'We're going to fight to get there' Sunday shows preview: Democratic candidates make the rounds after debate MORE (I-Vt.) and South Bend, Ind., Mayor Pete ButtigiegPeter (Pete) Paul ButtigiegO'Rourke responds to Buttigieg's gun criticism: 'That calculation and fear is what got us here in the first place' Buttigieg: Biden gave 'bad' debate answer on slavery's legacy O'Rourke's debate moment reignites gun debate on Sunday shows MORE all leading Trump by a margin of 55 percent to 45 percent.

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Sen. Elizabeth WarrenElizabeth Ann WarrenGun control: Campaigning vs. legislating Booker defends middle-ground health care approach: 'We're going to fight to get there' Democrats spar over electoral appeal of 'Medicare for All' MORE (D-Mass.) has a 7 point advantage over Trump, leading 53 to 46. Sen. Kamala HarrisKamala Devi HarrisHarris bashes Kavanaugh's 'sham' nomination process, calls for his impeachment after sexual misconduct allegation Gun control: Campaigning vs. legislating Booker defends middle-ground health care approach: 'We're going to fight to get there' MORE (D-Calif.) leads Trump 51 to 48, which is within the poll’s margin of error.

Democrat Hillary ClintonHillary Diane Rodham ClintonDershowitz: 'Too many politicians are being subject to criminal prosecution' The 13 Republicans needed to pass gun-control legislation Democrats spar over electoral appeal of 'Medicare for All' MORE defeated Trump by nearly 5 points in Colorado in 2016. Colorado is considered a battleground state, but it gone for the Democratic presidential candidate in the past three cycles.

Sen. Cory GardnerCory Scott Gardner The 13 Republicans needed to pass gun-control legislation Bolton returns to political group after exiting administration The Hill's Morning Report — Trump's hurricane forecast controversy won't go away MORE (R-Colo.) is up for reelection in 2020 and is widely viewed as the most vulnerable GOP incumbent in the Senate.

The poll found Gardner trailing former Colorado Gov. John HickenlooperJohn HickenlooperLeft off debate stage, Bullock all-in on Iowa Yang says he would not run as a third-party candidate The Hill's Morning Report - Hurricane Dorian devastates the Bahamas, creeps along Florida coast MORE by 13 points in a hypothetical match-up, with Hickenlooper taking 53 percent to Gardner’s 40 percent.

Hickenlooper ended his long-shot bid for president last week and said he is considering joining the crowded Democratic primary field, which already includes 15 other candidates, including former U.S. Ambassador Dan Baer, former state House Speaker Andrew Romanoff, state Sen. Angela Williams and former state Sen. Mike Johnston.

Gardner, who ousted Sen. Mark UdallMark Emery UdallPoll: Trump trails three Democrats by 10 points in Colorado The Hill's Morning Report — Trump and the new Israel-'squad' controversy Colorado candidates vying to take on Gardner warn Hickenlooper they won't back down MORE (D) in 2014, has $4.9 million in his campaign account, making him one of the most well-funded Republican incumbents up for reelection this year.

The Emerson College poll of 1,000 registered voters was conducted from Aug. 16 to Aug. 19 and has a 3 percentage point margin of error.