FBI Files: Clinton Aide Smashed Hillary's Old Phones—With a Hammer!

He added, "Who on earth destroys emails that are about your yoga schedule, or about Chelsea's wedding, or condolence notes? You only destroy evidence if its going to indicate that you've committed a crime...or it's politically toxic for your presidential campaign."

"There's so much smoke here, we believe there has to be fire," Duffy said. And he indicated that Republicans may hold Clinton in contempt for lying to Congress in testimony last fall about her private email server.

"We can hold her in contempt of Congress and send that to the Justice Department," Duffy said. "But do you think the Obama Department of Justice is going to pursue charges against Hillary Clinton? Not."