Ron Klain, the former White House chief of staff, is on Capitol Hill Thursday. (Andrew Harrer/Bloomberg via Getty Images)
"I found Mr. Klain to be very credible. He answered every single question. He was fully cooperative. There are times where he was asked about personal conversations he had with the president, and he was forthcoming," Khanna said.
"I really appreciate his candor and the comprehensive way he had answered every question."
Rep. Andy Biggs, R-Ariz., told Fox News Digital minutes later when asked if Klain was credible, "Yeah – when I say credible, I think he is telling what he knows accurately. I mean, he's trying to be accurate. So that's what I'd say."
Rep. Andy Biggs was also in the room during the Republicans' round of questioning. (Getty Images)
That means Klain's interview could go on for several hours.
Comer, R-Ky., is investigating whether Biden's top White House aides concealed signs of mental decline in the then-president, and if that meant executive actions were signed via autopen without his knowledge.
Biden maintained he "made every decision" in a recent interview with The New York Times.
Elizabeth Elkind is a politics reporter for Fox News Digital leading coverage of the House of Representatives. Previous digital bylines seen at Daily Mail and CBS News.
Follow on Twitter at @liz_elkind and send tips to elizabeth.elkind@fox.com
https://www.foxnews.com/politics/ex-biden-chief-staff-giving-credible-answers-house-oversight-cover-up-probe-lawmakers-say