Donald TrumpDonald TrumpFreedom Caucus member condemns GOP group pushing 'Anglo-Saxon political traditions' MyPillow CEO Mike Lindell's new free speech site to ban certain curse words Secret Facebook groups of special operations officers include racist comments, QAnon posts: report MORE, a 2016 GOP contender, told ABC News's George Stephanopoulos that he shouldn't ask Trump questions about Hillary ClintonHillary Diane Rodham ClintonPelosi on power in DC: 'You have to seize it' Cuba readies for life without Castro Chelsea Clinton: Pics of Trump getting vaccinated would help him 'claim credit' MORE, citing the anchor's long ties with the Democratic candidate, in a new interview.

“You shouldn’t be talking to me about that, in all fairness,” Trump said when asked to weigh in on Clinton in an excerpt from an interview released Wednesday. “You shouldn’t be asking me those questions, but I don’t mind.”

Trump went on to criticize Hillary Clinton’s use of a private email server while secretary of State.

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“What Hillary’s done with the emails is incredible,” he said. “She gets a subpoena, and then, after getting the subpoena, she cancels it? She cancels everything?”

“What she did is illegal,” he added. “What she did is totally illegal. I don’t know how she gets away with it.”

Trump noted Stephanopoulos's work for former President Bill ClintonWilliam (Bill) Jefferson ClintonDemocratic Rep. Mondaire Jones calls on Breyer to retire Modern biomedical breakthroughs require a federal ethics commission Biden must compel China and Russia to act on climate MORE and the recent controversy over his contributions to the Clinton Foundation.

Stephanopoulos interviewed Trump on Tuesday, after the real estate mogul officially launched his presidential bid at an event in New York City’s Trump Tower. The full interview is slated to air later this week.

The ABC News anchor apologized last month for reporting on Hillary Clinton’s campaign, despite previous charitable contributions he had made to the Clinton Foundation.

Stephanopoulos did not disclose those contributions ahead of an interview with the author of Clinton Cash, a book questioning the foundation's financial dealings.

“Those donations were a matter of public record, but I should have made additional disclosures on air when we covered the Foundation,” Stephanopoulos said on ABC’s “Good Morning America” on May 15.

“And I now believe that directing personal donations to that foundation was a mistake,” he continued.

“Even though I made them strictly to support work done to stop the spread of AIDS, help children and protect the environment in poor countries, I should have gone the extra mile to prevent even the appearance of conflict,” he added. “I apologize to all of you for failing to do that.”

Stephanopoulos previously served as an aide in former President Clinton’s White House before embarking on a successful journalism career.

The Clintons’ charitable organization has come under fire in recent months amid concerns over its past fundraising.

Critics charge that wealthy foreign donors made contributions to the Clinton Foundation in hopes of seeking political favors from then-Secretary of State Hillary Clinton.