Republican Christine O'Donnell returned to political debate on Thursday to slam GOP presidential front-runner Donald TrumpDonald John TrumpDems flip Wisconsin state Senate seat Sessions: 'We should be like Canada' in how we take in immigrants GOP rep: 'Sheet metal and garbage' everywhere in Haiti MORE.

"I have no desire to get in the fray. Now it looks like he's going to be the nominee. I can't sit back anymore. I can't hold my tongue," O'Donnell said during an interview on CNN.

"He did nothing to liberate the middle class from political correctness until he decided to run for president," O'Donnell added during her interview with Brooke Baldwin.

O'Donnell is known in political circles for a stunning upset during the Tea Party wave of 2010 when she defeated establishment favorite and former Rep. Mike Castle in the GOP Senate primary in Delaware.

She was famous for declaring in a campaign ad that she was "not a witch" after suggestions that she dabbled in witchcraft in her youth. She ended up losing by wide margins to Sen. Chris CoonsChristopher (Chris) Andrew CoonsA Department of Energy foundation: An idea whose time has come We must reconcile privacy and safety in the digital era Protecting intellectual property in America is harder than ever MORE (D).

"He's not actually doing anything except inciting riots," she said of Trump on Wednesday, emphasizing words "have consequences."