Green Party presidential candidate Jill Stein on Monday ramped up her attacks on Hillary Clinton Hillary Diane Rodham ClintonBiden leads Trump by 36 points nationally among Latinos: poll Democratic super PAC to hit Trump in battleground states over coronavirus deaths Battle lines drawn on precedent in Supreme Court fight MORE for using a private email system while serving as the nation’s top diplomat and maintaining a fuzzy boundary between her official and private duties.

In an interview with CNN, Stein appeared to reiterate her call for the Justice Department to prosecute Clinton for mishandling government secrets, and also joined in the attacks on her relationship with the Clinton Foundation.

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"I think there should have been a full investigation,” Stein said. “I think the American people are owed an explanation for what happened, and why top secret information was put at risk, why the identity of secret agents were potentially put at risk.”

"There is much more that is coming to public attention about Hillary Clinton's behavior, including the recent revelations about favors bestowed on the Clinton Foundation's donors who got special deals, who got state partnerships,” she added, in a reference to recently released emails suggesting blurred lines between Clinton’s position as secretary of State and her vast personal and philanthropic connections.

“If she wasn't aware that she was violating State Department rules, it raises real issues about her competency."

Stein has previously criticized the Justice Department’s decision not to indict Clinton or her senior aides for the email set-up, a move that she said gave the Democratic presidential nominee “a pass.”

The explicit reference to her ties to the Clinton Foundation amounts to a doubling-down on the position, and an echo of complaints normally heard from Republicans.

Stein may be sensing a vulnerability for the Democratic nominee, who has repeatedly struggled to sustain voters’ trust. However, it also poses a danger, since many liberals have been suspicious of what they call Republicans' obsession with the email issue and Clinton’s web of relationships.

GOP nominee Donald Trump Donald John TrumpBiden leads Trump by 36 points nationally among Latinos: poll Trump dismisses climate change role in fires, says Newsom needs to manage forest better Jimmy Kimmel hits Trump for rallies while hosting Emmy Awards MORE and other top Republican officials have lambasted Clinton following last week’s release of the new emails, in which senior Clinton aides seemed to grant favors to people in the Clinton Foundation orbit.