NEWYou can now listen to Fox News articles! House Oversight Committee Chairman James Comer, R-Ky., is widening his investigation into the alleged ‘cover-up’ of former President Joe Biden’s mental decline by seeking interviews with five more former White House aides. Comer sent letters to five more top former Biden staffers, putting his total outreach in the investigation to 10 people so far. The latest round of letters are being sent to former White House Chief...