Matt Bennett, co-founder of centrist think tank Third Way, on Wednesday questioned the legitimacy of some of the progressive plans laid out by 2020 Democratic presidential candidates, warning that pushes for free health care or college tuition could alienate some voters.

“For most people, technology has been bad — it’s been a headwind and government hasn’t done anything to adjust that, absolutely Democrats have to offer a bold and big vision,” Bennett, whose group has been vocal about its opposition to 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.), told Hill.TV.

“But when we offer them that seem fake, like your health care’s going to be free, like your college is going to be free,” he continued. “Most people don’t hear free college and think ‘oh that’s going to help me and my family.’ ”

"Then we turn people off," he added, saying Democrats need to put forth proposals that have a better chance of passing and helping Americans now.

Bennett also doubled down on previous remarks made by the group’s president, Jon Cowan, who called Sanders an “existential threat to the future of the Democratic Party for the next generation,” according to a report by The Guardian.

"We think Sanders would be a real threat to Democrats because we don’t think he can beat Trump, and that is an existential threat," he told Hill.TV. "Our fear is that Bernie can’t do for Democrats what we did in 2018, which is to win in places like Michigan, Wisconsin, Pennsylvania."

A number of 2020 hopefuls have touted plans to address the rise of student debt and college tuition.

Sanders and 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.) have released plans that aim to make college free and eliminate student debt.

The two liberal rivals have also led the field on embracing “Medicare for All,” which was authored by Sanders and remains a contentious issue among Democrats.

Warren was one of only two candidates on the first night of night of the first Democratic primary debates who raised her hand when asked who would abolish private insurance in favor of a government-run, single-payer system.

“I’m with Bernie,” Warren said at the time.

Other White House candidates, such as 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.), appear to more reluctant to say that they would get rid of private insurance.

Though she initially raised her hand on the question during the second night of debates, Harris later walked back her position on abolishing private insurance in favor of a government-run system.

"I am supportive of Medicare for All, and under Medicare for All policy, private insurance would certainly exist for supplemental coverage," she told CBS News the following morning.

⁠—Tess Bonn