New York City Mayor Bill de Blasio Bill de BlasioOVERNIGHT ENERGY: California seeks to sell only electric cars by 2035 | EPA threatens to close New York City office after Trump threats to 'anarchist' cities | House energy package sparks criticism from left and right EPA threatens to close New York City office after Trump threats to 'anarchist' cities New Year's Eve in Times Square to be largely virtual amid pandemic MORE, a Democratic presidential hopeful, defended his decision to appear on Sean Hannity Sean Patrick HannityFormer Florida attorney general calls Kyle Rittenhouse 'a little boy out there trying to protect his community' Sunday shows preview: Justice Ginsburg dies, sparking partisan battle over vacancy before election Cruz: Trump should nominate a Supreme Court justice next week MORE's Fox News program this week, arguing that "millions and millions of Americans are watching" the network and its viewers "are not a monolith."

“Millions and millions of Americans are watching and we shouldn’t stereotype them," de Blasio told NY1, a local cable news station in New York City, on Monday. "A lot of those folks watching are working people who are listening to change in one form or another. And I think it's important to challenge those right-wing voices. And while we're having a presidential election, we have to speak to all of America."

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De Blasio was also asked by host Errol Louis if he agreed with the criticism of 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.), another presidential candidate, who branded Fox News as a "hate-for-profit" channel. Warren refused to sit down for any interviews or town hall events on the network even though several 2020 Democratic presidential candidates, including 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.), Sen. Amy Klobuchar Amy Klobuchar3 reasons why Biden is misreading the politics of court packing Social media platforms put muscle into National Voter Registration Day Battle lines drawn on precedent in Supreme Court fight MORE (D-Minn.) and 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 (D), did.

"I respect Elizabeth Warren, but I disagree with that," de Blasio said before later adding that Fox News viewers are "not a monolith."

"A lot of them are people who hear ideas and might change their minds," he said.

De Blasio's interview with Hannity is scheduled for Wednesday at 9 p.m.

Hannity's program has consistently finished as the most watched show in cable news in 2019.

The staunch supporter of President Trump Donald John TrumpSteele Dossier sub-source was subject of FBI counterintelligence probe Pelosi slams Trump executive order on pre-existing conditions: It 'isn't worth the paper it's signed on' Trump 'no longer angry' at Romney because of Supreme Court stance MORE averaged 3.3 million total viewers in July while also finishing at the top of the key 25- to 54-year-old demographic advertisers covet most by averaging 527,000 viewers in the category.

De Blasio's comments come as he struggles in the polls, averaging just 0.2 percent support in the RealClearPolitics index. He has not yet met the criteria to qualify for the third Democratic primary debates, set for September.

Updated at 10:18 a.m.