Rep. Jason ChaffetzJason ChaffetzHouse Oversight panel demands DeVos turn over personal email records The Hill's Morning Report - Presented by JUUL Labs - Trump attack on progressive Dems draws sharp rebuke GOP senators decline to criticize Acosta after new Epstein charges MORE (R-Utah) is asking why Hillary ClintonHillary Diane Rodham ClintonMissing piece to the Ukraine puzzle: State Department's overture to Rudy Giuliani On The Money: Trump downplays urgency of China trade talks | Chinese negotiators cut US trip short in new setback | Trump sanctions Iran's national bank | Survey finds Pennsylvania, Wisconsin lost the most factory jobs in past year Meghan McCain, Ana Navarro get heated over whistleblower debate MORE's staff continues to plead the Fifth Amendment if the Democratic presidential nominee herself is "clean."

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"If she thinks she's clean, then tell everybody around her to go ahead, stop pleading the Fifth, come to Congress, and tell us the truth because the closest people to Hillary Clinton, they keep pleading the Fifth," Chaffetz, chairman of the House Oversight Committee, said during a Fox News interview on Sunday.

"Maybe it's time they stop doing that and actually tell the truth to the American people. They haven't done that yet," he added. 

On Sunday, Chaffetz released a letter from FBI Director James Comey telling lawmakers that the bureau would not change its conclusion in the investigation into Clinton's private server and whether the former Secretary of State mishandled classified information.

Late last month, Comey told Congress that Clinton's case was under new review after the FBI discovered emails potentially relevant to the investigation. It was later reported that those emails, allegedly found during a separate investigation into former Rep. Anthony Weiner (D-N.Y.), were mostly duplicates.

Chaffetz said last month that House Republicans were gearing up for "years" of investigations into Clinton should she win the presidency on Nov. 8.