Biden expands lead over 2020 Democrats: poll

Former Vice President Joe BidenJoe BidenUkrainian official denies Trump pressured president Trump goes after New York Times, Washington Post: 'They have gone totally CRAZY!!!!' Warren overtakes Biden in Iowa for first time: poll MORE has widened his lead among fellow 2020 Democrats, with a new poll showing him atop the crowded field by double digits.

Twenty-nine percent of Democratic and Democratic-leaning registered voters said they supported Biden in the CNN poll released early Tuesday. Sen. Bernie SandersBernie SandersWarren overtakes Biden in Iowa for first time: poll The polls are asking the wrong question Sanders unveils plan to eliminate Americans' medical debt MORE (I-Vt.) has 15 percent and Sen. Elizabeth WarrenElizabeth Ann WarrenWarren overtakes Biden in Iowa for first time: poll Warren avoids attacks while building momentum Sanders unveils plan to eliminate Americans' medical debt MORE (D-Mass.) is at 14 percent, according to CNN.

Biden’s support has risen 7 points since a survey conducted in late June, with no other candidate making significant improvements in polling numbers, CNN noted.

Biden’s supporters are more often self-identified Democrats than independents, older rather than younger, and are moderate and conservative voters instead of liberals, pollsters found.

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Thirty-one percent of self-identified Democrats, 34 percent of voters ages 45 and older, and 34 percent of moderate and conservative voters back Biden, according to the poll.

Biden’s support also comes from the 54 percent of Democratic and Democratic-leaning registered voters whose main goal is to boot President TrumpDonald John TrumpAlaska Republican Party cancels 2020 primary Ukrainian official denies Trump pressured president Trump goes after New York Times, Washington Post: 'They have gone totally CRAZY!!!!' MORE from office in 2020, with 35 percent of individuals in that group supporting the former vice president.

While Biden’s support has increased, Sen. Kamala HarrisKamala Devi HarrisWarren overtakes Biden in Iowa for first time: poll Iowa GOP swipes at 2020 Democrats' meat positions as candidates attend annual Steak Fry Warren avoids attacks while building momentum MORE (D-Calif.) has seen a notable decline in support, with 5 percent of potential Democratic voters backing the senator, compared to 17 percent in the June poll, which was conducted soon after the first round of Democratic presidential primary debates. Harris and Biden clashed during the first round of debates, with the California senator challenging Biden on his views on busing.

The new poll was conducted from Aug. 15 to Aug. 18 and surveyed 1,001 adult registered voters. It has a margin of error of 3.7 percentage points.