articleThe Brief Dr. Kevin O’ Connor, former President Joe Biden’s White House doctor, was issued a subpoena by the House Oversight Committee chair. President Donald Trump released a memo to investigate Biden’s use of an autopen questioning Biden’s mental capabilities. The personal physician for former President Joe Biden is being issued a subpoena by House Republicans. Dig deeper:House Oversight Committee chair James Comer (R-Ky.) has an investigation centered on former President Joe Biden’s mental fitness and decline. Biden investigationThe backstory:House Republicans’ investigation of former President Joe Biden focuses on whether key actions taken in his remaining days in office, including pardons and federal rule changes, might be legally invalid.