Rep. Jason Chaffetz Jason ChaffetzThe myth of the conservative bestseller Elijah Cummings, Democratic chairman and powerful Trump critic, dies at 68 House Oversight panel demands DeVos turn over personal email records MORE (R-Utah) is asking why Hillary Clinton Hillary Diane Rodham ClintonButtigieg stands in as Pence for Harris's debate practice Senate GOP sees early Supreme Court vote as political booster shot Poll: 51 percent of voters want to abolish the electoral college 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.