Biden holds 12-point lead over Trump in head-to-head poll

Former Vice President Joe BidenJoe BidenBiden alleges Sanders campaign 'doctored video' to attack him on Social Security record Sanders campaign responds to Biden doctored video claims: Biden should 'stop trying to doctor' public record Capt. "Sully" Sullenberger pens op-ed in defense of Biden: 'I stuttered once, too. I dare you to mock me' MORE holds a double-digit lead over President TrumpDonald John TrumpTrump's newest Russia adviser, Andrew Peek, leaves post: report Hawley expects McConnell's final impeachment resolution to give White House defense ability to motion to dismiss Trump rips New York City sea wall: 'Costly, foolish' and 'environmentally unfriendly idea' MORE in a head-to-head match-up, according to a poll released Tuesday.

Biden, the Democratic front-runner, leads Trump by 12 points in an Investors Business Daily/TIPP poll, with the former vice president supported by 54 percent of poll respondents. The margin is a 1 point drop for Biden over Trump between August and July, when Biden held a 13-point margin over Trump in the same poll.

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Other top Democratic 2020 contenders, Sens. Bernie SandersBernie SandersBiden alleges Sanders campaign 'doctored video' to attack him on Social Security record Sanders campaign responds to Biden doctored video claims: Biden should 'stop trying to doctor' public record The Memo: Sanders-Warren battle could reshape Democratic primary MORE (I-Vt.), Elizabeth WarrenElizabeth Ann WarrenThe Memo: Sanders-Warren battle could reshape Democratic primary Environmental activists interrupt Buttigieg in New Hampshire Pence to visit Iowa days before caucuses MORE (D-Mass.) and Kamala HarrisKamala Devi HarrisParnas pressure grows on Senate GOP Sanders defends vote against USMCA: 'Not a single damn mention' of climate change The Hill's Morning Report — President Trump on trial MORE (D-Calif.), also hold leads over Trump, albeit by single digits.

Sanders was supported by 49 percent of poll respondents, compared to 45 percent for Trump, while Warren and Harris led 49 percent to 46 percent for Trump, in a hypothetical general election contest.

Both Biden and Sanders held strong leads over the president among independent voters, according to the poll, with both men winning more than 50 percent of independent voters in head-to-head match-ups with Trump.

Warren, meanwhile, struggled in that demographic, winning the support of just 47 percent of independent voters to 45 percent for Trump.

The match-up polling measured responses from 848 registered voters collected from Aug. 22-30, with a margin of error of 3.3 percentage points.