Donald TrumpDonald TrumpTrump announces new social media network called 'TRUTH Social' Virginia State Police investigating death threat against McAuliffe Meadows hires former deputy AG to represent him in Jan. 6 probe: report MORE on Wednesday said that as president he would examine indicting Hillary ClintonHillary Diane Rodham ClintonMeghan McCain: 'SNL' parodies made me feel like 'laughing stock of the country' Hill: Trump reelection would spur 'one constitutional crisis after another' Trump defends indicted GOP congressman MORE over her private email server.

“Certainly that is something you would look at,” he told host Bill O’Reilly on Fox News’s “The O’Reilly Factor." "I would only do something 100 percent fair. You’d certainly have to look at it very fairly.”

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But Trump said that an indictment against Clinton for using a personal email server while serving as secretary of State is ultimately unlikely.

“I don’t think she will be indicted,” the GOP presidential front-runner said of his Democratic counterpart. “I think the Democratic Party will protect her. I think what she’s done is very, very serious. I think they’re a big part of her life story right now.”

Trump said that Sen. Bernie SandersBernie SandersUnder pressure, Democrats cut back spending The Memo: Cuts to big bill vex Democrats Democrats say they're committed to reducing emissions in Biden plan MORE (I-Vt.) must regret not using Clinton’s email controversy against her during their battle for the Democratic presidential nomination.

“He made a big mistake by not doing the emails,” he said, referencing Sanders’s quip last October that Americans were “sick and tired” of hearing about Clinton’s technology habits. "He wished he could do that over again. I don’t think that the emails are that nasty.”

The FBI formally confirmed in February that it is investigating Clinton’s private email server at the State Department.

FBI Director James Comey said earlier this month that his agency is in no hurry to finish its probe before the Democratic National Convention in Philadelphia in July.

“The urgency is to do it well and do it promptly,” he told The Niagara Gazette on April 5. "And ‘well’ comes first.”

Critics say Clinton’s use of a private server at State prevented accountability of her tenure and potentially exposed sensitive national intelligence.

At issue is whether 22 emails should have been classified at the highest level of “top secret” when they were sent.