Poll: Trump trails three Democrats by 10 points in Colorado

A new poll finds President TrumpDonald John TrumpSchiff pleads to Senate GOP: 'Right matters. And the truth matters.' Anita Hill to Iowa crowd: 'Statute of limitations' for Biden apology is 'up' Sen. Van Hollen releases documents from GAO investigation 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 BidenSchiff pleads to Senate GOP: 'Right matters. And the truth matters.' Anita Hill to Iowa crowd: 'Statute of limitations' for Biden apology is 'up' Sen. Van Hollen releases documents from GAO investigation MORE, Sen. Bernie SandersBernie SandersBiden, Sanders contend for top place in new national poll Biden leads Democratic primary field nationally: poll Warren calls for Brazil to drop charges against Glenn Greenwald MORE (I-Vt.) and South Bend, Ind., Mayor Pete ButtigiegPeter (Pete) Paul ButtigiegBiden, Sanders contend for top place in new national poll Biden leads Democratic primary field nationally: poll Trump to hold rally on eve of New Hampshire primary MORE all leading Trump by a margin of 55 percent to 45 percent.

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Sen. Elizabeth WarrenElizabeth Ann WarrenHarris weighing Biden endorsement: report Biden, Sanders contend for top place in new national poll Biden leads Democratic primary field nationally: poll MORE (D-Mass.) has a 7 point advantage over Trump, leading 53 to 46. Sen. Kamala HarrisKamala Devi HarrisHarris weighing Biden endorsement: report California Democrat Christy Smith launches first TV ad in bid for Katie Hill's former House seat Steyer spokesperson: 'I don't think necessarily that Tom has bought anything' MORE (D-Calif.) leads Trump 51 to 48, which is within the poll’s margin of error.

Democrat Hillary ClintonHillary Diane Rodham ClintonSchiff pleads to Senate GOP: 'Right matters. And the truth matters.' Hill.TV's Saagar Enjeti defends Tulsi Gabbard's lawsuit against Hillary Clinton Trump to hold rally on eve of New Hampshire primary 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 GardnerSenate Republicans confident they'll win fight on witnesses Tensions between McConnell and Schumer run high as trial gains momentum McConnell keeps press in check as impeachment trial starts 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 HickenlooperMitch McConnell may win the impeachment and lose the Senate Hickenlooper raised .8 million for Colorado Senate bid in fourth quarter of 2019 George Conway group releases ad targeting GOP senator: 'You're just another Trump servant' 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 UdallDemocrats will win back the Senate majority in 2020, all thanks to President Trump Poll: Trump trails three Democrats by 10 points in Colorado The Hill's Morning Report — Trump and the new Israel-'squad' controversy 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.