When she was secretary of state, it doesn't look like Hillary Clinton, now a Democratic presidential candidate, was the biggest fan of Fox News.

In a newly released batch of emails, one from 2009 shows a conversation between Clinton and longtime friend Marty Torrey, wherein Clinton takes a subtle dig at the right-leaning cable news channel.

RELATED: Complete coverage of Hillary Clinton's email scandal

In the email, Torrey asks Clinton if she was able to see Massachusetts state Rep. Harold "Hank" Naughton in an appearance on Fox News that morning.

"You may not have caught our friend Hank on Fox News at 6:15 AM today," Torrey wrote to Clinton. "He did a great job on the issue of troop requirements in Afghanistan and the controversy ... Spoke with Hank yesterday. He was characteristically a 'cool hand' this morning in what I think was his national media 'debut'. Hope all is well. Best, Marty."

Naughton endorsed Clinton for president in June of this year.

Clinton replied to Torrey, "Yeah for Hank! Maybe he will become a regular. Those shows need at least one sane realistic voice."

Torrey, who previously served as chief of staff to Rep. John Sweeney, R-N.Y., sent back one more email. "Yep — especially certain Fox personalities," he wrote. "I went to college with [Fox anchor Bill] O'Reilly."

Clinton's last appearance on Fox was in June 2014 with anchors Bret Baier and Greta Van Susteren. She sat for an interview with O'Reilly in April 2008, near the end of the presidential primary, which she lost to then-Sen. Barack Obama.