(CNN) Political reactions to ABC News chief anchor George Stephanopoulos's admission of donations to the Clinton Foundation continued on Friday, with questions centering on whether the former Clinton strategist was fit to moderate presidential debates.

Most 2016 Democratic presidential hopefuls shrugged off questions about a possible conflict of interest after Stephanopoulos revealed he donated $75,000 to the foundation from 2012 to 2014, which he did not disclose during a recent interview with the author of an anti-Clinton book.

But former Rhode Island Gov. Lincoln Chafee's spokeswoman said Stephanopoulos breached journalistic ethics.

"Governor Chafee believes it is a clear violation of the Society of Professional Journalists' Code of Ethics," said Debbie Rich. "When asked about whether journalists should engage in political activity, the SPJ Ethics Committee says the simplest answer is 'No.' Don't do it. Don't get involved. Don't contribute money, don't work in a campaign, don't lobby, and especially, don't run for office yourself."

Vermont Independent Sen. Bernie Sanders, the only declared Democratic candidate besides Hillary Clinton, told Brianna Keilar on CNN's "State of the Union" in an interview scheduled to air Sunday that Stephanopoulos should have made the donations public earlier.

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