Sen. Elizabeth Warren Elizabeth WarrenHillicon Valley: Subpoenas for Facebook, Google and Twitter on the cards | Wray rebuffs mail-in voting conspiracies | Reps. raise mass surveillance concerns On The Money: Anxious Democrats push for vote on COVID-19 aid | Pelosi, Mnuchin ready to restart talks | Weekly jobless claims increase | Senate treads close to shutdown deadline Democratic senators ask inspector general to investigate IRS use of location tracking service MORE (D-Mass.) has rocketed to the top of the latest straw poll from the progressive news and activism website Daily Kos.

Warren has surged past Sen. Bernie Sanders Bernie SandersThe Hill's Campaign Report: Trump faces backlash after not committing to peaceful transition of power Bernie Sanders: 'This is an election between Donald Trump and democracy' The Hill's 12:30 Report: Trump stokes fears over November election outcome MORE (I-Vt.) in the biweekly survey, notching 34 percent support, a 9-point jump from the same survey in May and her highest mark to date.

Sanders has fallen 9 points from the previous survey and comes in at 25 percent in the poll. Sanders topped out at 44 percent support in February, when Warren was at only 10 percent.

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The Daily Kos straw poll is not a scientific evaluation of voter preferences but serves as a gauge of where enthusiasm is among the liberal base. Warren topped the website's first 2020 straw poll in January, but, as the website notes in its latest analysis, Sanders has dominated the poll since formally announcing his candidacy in February.

The battle between the two progressive stalwarts is heating up, however, as a string of recent polls have found Warren gaining momentum.

Sanders captured the imaginations of liberal and progressive voters with his unlikely run against former Secretary of State Hillary Clinton Hillary Diane Rodham ClintonFox News poll: Biden ahead of Trump in Nevada, Pennsylvania and Ohio Trump, Biden court Black business owners in final election sprint The power of incumbency: How Trump is using the Oval Office to win reelection MORE in the 2016 Democratic primary, but early surveys of the 2020 race show that he’ll have to fend off a challenge from Warren for the progressive mantle, as both candidates chase former Vice President Joe Biden Joe BidenPelosi slams Trump executive order on pre-existing conditions: It 'isn't worth the paper it's signed on' Hillicon Valley: Subpoenas for Facebook, Google and Twitter on the cards | Wray rebuffs mail-in voting conspiracies | Reps. raise mass surveillance concerns Fox News poll: Biden ahead of Trump in Nevada, Pennsylvania and Ohio MORE.

“Since winning the very first Daily Kos presidential straw poll of the cycle back in January, Sen. Elizabeth Warren has demonstrated her steady strength in the Democratic primary field by placing among the top four candidates every single time,” said Daily Kos founder and publisher Markos Moulitsas.

Biden is in third place in the straw poll, up 2 points to 12 percent, followed by 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 at 10 percent and Sen. Kamala Harris Kamala HarrisHundreds of lawyers from nation's oldest African American sorority join effort to fight voter suppression Biden picks up endorsement from progressive climate group 350 Action 3 reasons why Biden is misreading the politics of court packing MORE (D-Calif.) at 7 percent.