Presidential candidate 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 (D-Mass.) picked up an important endorsement Wednesday from Michael Fitzgerald, Iowa’s longtime state treasurer.

Fitzgerald is the longest-serving state treasurer in the country, and one of the last two uncommitted Democratic officials elected statewide in Iowa.

Fitzgerald’s endorsement is Warren’s sixth from an Iowa state official.

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A new poll released Wednesday by the Democratic group Focus on Rural America found Warren in a virtual tie with 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 among Iowa Democrats.

Iowa is a critical state for Warren, who with a victory in the caucuses next year could turbocharge her campaign.

In explaining his endorsement, Fitzgerald told The Associated Press that Warren “can address the biggest problems we have, and that is the hollowing out of the middle class. She’s clear, you understand her message, and I want her fighting for me and all of us.”

If history means anything, then the endorsement could prove pivotal for Warren.

In 2007, Fitzgerald was an early endorser of then-Sen. Barack Obama Barack Hussein ObamaDemocrats ramp up pressure on Lieberman to drop out of Georgia Senate race The Hill's Campaign Report: Biden on Trump: 'He'll leave' l GOP laywers brush off Trump's election remarks l Obama's endorsements Trump pledges to make Juneteenth a federal holiday, designate KKK a terrorist group in pitch to Black voters MORE (D-Ill.), who went on to win the Iowa caucuses.

Warren and her fellow candidates will be back in Iowa this weekend for the Polk County Democratic Party Steak Fry, a significant fundraising event as the countdown to the Iowa Democratic caucuses begins to enter the homestretch.