Hillary ClintonHillary Diane Rodham ClintonSuper PACs release ad campaign hitting Vance over past comments on Trump I voted for Trump in 2020 — he proved to be the ultimate RINO in 2021 Neera Tanden tapped as White House staff secretary MORE’s campaign is out with a new video panning the Republican presidential field as “mad scientists” who deny the effects of climate change.

The new spot centers on the use of the phrase “I’m not a scientist” by Republican candidates when discussing climate change.

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“Faced with the threat of climate change, Republicans repeat one chilling phrase: I am not a scientist,” the spot says, before running down instances where former Gov. Jeb Bush (R-Fla.), Sen. Marco RubioMarco Antonio RubioSenate GOP campaign arm outraises Democratic counterpart in September House passes bills to secure telecommunications infrastructure Senators call for answers from US firm over reported use of forced Uyghur labor in China MORE (R-Fla.), former Gov. Rick Perry (R-Texas), and Gov. Scott Walker (R-Wis.) all said the line.

“Feel the terror as they deny established science,” the video continues, as video of former Sen. Rick Santorum (R-Penn), Sen. Ted CruzRafael (Ted) Edward CruzOvernight Health Care — Presented by Carequest — Colin Powell's death highlights risks for immunocompromised The Senate confirmation process is broken — Senate Democrats can fix it Australian politician on Cruz, vaccines: 'We don't need your lectures, thanks mate' MORE (R-Texas), Sen. Marco Rubio (R-Fla.), Gov. Bobby Jindal (R-La.), and Donald TrumpDonald TrumpGrant Woods, longtime friend of McCain and former Arizona AG, dies at 67 Super PACs release ad campaign hitting Vance over past comments on Trump Glasgow summit raises stakes for Biden deal MORE all push back against the idea that humans cause global warming or that there’s action that can be taken to prevent it.

“And the scariest part? One of these mad (not a) scientists could be president,” the ad closes.

Almost 9 out of 10 Democrats believe that global warming exists, compared to 45 percent of Republicans, according to a June poll by the Pew Research Center.

Climate change was Clinton’s theme of the day on Monday, the morning after she released her plan on expanding renewable energy to fight climate change. She laid out more on her plan in Iowa Monday, but didn’t take a side on the most controversial issue, the Keystone XL pipeline.