Sen. Elizabeth Warren Elizabeth WarrenOvernight Defense: Appeals court revives House lawsuit against military funding for border wall | Dems push for limits on transferring military gear to police | Lawmakers ask for IG probe into Pentagon's use of COVID-19 funds On The Money: Half of states deplete funds for Trump's 0 unemployment expansion | EU appealing ruling in Apple tax case | House Democrats include more aid for airlines in coronavirus package Warren, Khanna request IG investigation into Pentagon's use of coronavirus funds MORE’s (D-Mass) support jumped up in a new poll, cutting into former Vice President Joe Biden Joe BidenFormer Pence aide: White House staffers discussed Trump refusing to leave office Progressive group buys domain name of Trump's No. 1 Supreme Court pick Bloomberg rolls out M ad buy to boost Biden in Florida 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. ADVERTISEMENT

Sen. Bernie Sanders Bernie SandersSirota reacts to report of harassment, doxing by Harris supporters Republicans not immune to the malady that hobbled Democrats The Hill's Morning Report - Sponsored by Facebook - Republicans lawmakers rebuke Trump on election MORE (I-Vt.) remains in third with the support of 12 percent of those surveyed, consistent with last month’s poll, while Sen. Kamala Harris Kamala HarrisTexas Democratic official urges Biden to visit state: 'I thought he had his own plane' The Hill's Campaign Report: Biden on Trump: 'He'll leave' l GOP laywers brush off Trump's election remarks l Obama's endorsements A game theorist's advice to President Trump on filling the Supreme Court seat 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 Buttigieg Pete ButtigiegBillionaire who donated to Trump in 2016 donates to Biden The Hill's Morning Report - Sponsored by Facebook - GOP closes ranks to fill SCOTUS vacancy by November Buttigieg stands in as Pence for Harris's debate practice MORE, who's at 5 percent support, while Sen. Cory Booker Cory Anthony BookerThe movement to reform animal agriculture has reached a tipping point Watchdog confirms State Dept. canceled award for journalist who criticized Trump 3 reasons why Biden is misreading the politics of court packing 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.