More than 120 signed the 'Open Letter from Retired Generals and Admirals' The letter questioned the integrity of the U.S. election It also questions Biden's mental fitness, blasts the Iran deal, says 'anarchy' cannot be tolerated, and says 'illegals are flooding our country' It echoes Trump's claims that absentee ballots are not secure Other retired military officers slammed the letter as intrusion in domestic politics Said Retired Adm. Mike Mullen, former chair of the joint chiefs: 'I think it hurts the military and by extension it hurts the country'