Presidential hopeful Rep. Tulsi Gabbard Tulsi GabbardRepublicans call on DOJ to investigate Netflix over 'Cuties' film Hispanic Caucus campaign arm endorses slate of non-Hispanic candidates Gabbard says she 'was not invited to participate in any way' in Democratic convention MORE (D-Hawaii) called out her Democratic opponents for fundraising off of impeachment on Monday, accusing them of undermining the credibility of the inquiry.

"Candidates for POTUS who are fundraising off 'impeachment' are undermining credibility of inquiry in eyes of American people, further dividing our already fractured country," Gabbard said in a tweet.

"Please stop. We need responsible, patriotic leaders who put the interests of our country before their own," she continued.

Candidates for POTUS who are fundraising off "impeachment" are undermining credibility of inquiry in eyes of American people, further dividing our already fractured country. Please stop. We need responsible, patriotic leaders who put the interests of our country before their own. — Tulsi Gabbard (@TulsiGabbard) September 30, 2019

Democrats have used the issue to shore up fundraising support from donors after Speaker Nancy Pelosi Nancy PelosiDemocratic senator to party: 'A little message discipline wouldn't kill us' Overnight Health Care: New wave of COVID-19 cases builds in US | Florida to lift all coronavirus restrictions on restaurants, bars | Trump stirs questions with 0 drug coupon plan Overnight 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 MORE (D-Calif.) announced on Tuesday that the House would launch a formal impeachment inquiry into President Trump Donald John TrumpFederal prosecutor speaks out, says Barr 'has brought shame' on Justice Dept. Former Pence aide: White House staffers discussed Trump refusing to leave office Progressive group buys domain name of Trump's No. 1 Supreme Court pick MORE amid allegations from a whistleblower that Trump sought to persuade Ukraine to investigate former Vice President Joe Biden, the front-runner for the Democratic presidential nomination.

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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 (D-Calif.) and Montana Gov. Steve Bullock Steve BullockCourt removes Pendley from role as public lands chief On The Trail: Making sense of this week's polling tsunami McConnell locks down key GOP votes in Supreme Court fight MORE (D) have sent out supporter emails with petition links that lead to a donations page, while 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.) has put out a number of impeachment ads on social media, according to ABC News.

Republicans have also cashed in on impeachment, raising $13 million for the Trump campaign in the days after Pelosi's announcement.