On FOX News 'Special Report,' Bret Baier and Aishah Hasnie reported on President Joe Biden Adviser, Anita Dunn, testifying before Congress on Biden's mental health: BRET BAIER: Long time adviser to former President Biden,

Former White House senior adviser Anita Dunn arrived on Capitol Hill Thursday morning for a closed-door interview with House Oversight Committee investigators, as part of the panel’s intensifying probe into whether top aides worked to conceal signs of former President Joe Biden’s mental decline.

Fox News' Aishah Hasnie provides updates on the probe into the alleged cover-up of former President Biden's mental decline. Fox News contributor Guy Benson weighs in as former Biden advisor Anita Dunn sits for an interview.