Warren narrows Biden's lead in new poll

Sen. Elizabeth WarrenElizabeth Ann WarrenUnited Auto Workers strike against GM poised to head into eighth day Omar: Biden not the candidate to 'tackle a lot of the systematic challenges that we have' Seven takeaways from a busy Democratic presidential campaign weekend in Iowa MORE’s (D-Mass) support jumped up in a new poll, cutting into former Vice President Joe BidenJoe BidenUnited Auto Workers strike against GM poised to head into eighth day Trump doubles down on call to investigate Biden after whistleblower complaint: 'That's the real story' Omar: Biden not the candidate to 'tackle a lot of the systematic challenges that we have' MORE's lead in the Democratic presidential primary. 

Warren had the support of 24 percent of registered Democrats and Democratic-leaning independent voters, based on an IBD/TIPP poll released Tuesday, marking a 7-point uptick for the senator since an August poll.

By contrast, Biden saw a 2 point decrease in his support, leaving it at 28 percent. He now leads Warren by just 4 points, compared to a 13 point difference in the previous poll.

Biden's lead over Warren in the IBD/TIPP survey is smaller than in some other national polls. A RealClearPolitics average of polls has Biden's support at 30.1 percent, a 12.7 point lead over Warren’s 17.4 percent. 

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Sen. Bernie SandersBernie SandersOmar: Biden not the candidate to 'tackle a lot of the systematic challenges that we have' Seven takeaways from a busy Democratic presidential campaign weekend in Iowa Democrats go all out to court young voters for 2020 MORE (I-Vt.) remains in third with the support of 12 percent of those surveyed, consistent with last month’s poll, while Sen. Kamala HarrisKamala Devi HarrisSeven takeaways from a busy Democratic presidential campaign weekend in Iowa Fracking ban could have unintended consequence of boosting coal Poll: Voters back Medicare expansion, keeping private insurance MORE's (D-Calif.) support dropped 5 points, from 11 percent to 6 percent.

Harris is now just slightly ahead of South Bend, Ind., Mayor Pete ButtigiegPeter (Pete) Paul ButtigiegOmar: Biden not the candidate to 'tackle a lot of the systematic challenges that we have' Seven takeaways from a busy Democratic presidential campaign weekend in Iowa Democrats go all out to court young voters for 2020 MORE, who's at 5 percent support, while Sen. Cory BookerCory Anthony BookerSeven takeaways from a busy Democratic presidential campaign weekend in Iowa Iowa GOP swipes at 2020 Democrats' meat positions as candidates attend annual Steak Fry Booker aide sounds alarm about campaign's funding MORE (D-N.J.) is at 4 percent based on the IBD/TIPP poll.  

No other candidates polled higher than 1 percent. 

The poll reflects 903 responses collected from Aug. 22-30. There is a margin of error of 3.3 percentage points. The questions regarding the 2020 election reflect 360 registered voters who identify as Democrats or independents who lean Democrat.