Progressives are desperately working to defend President Joe Biden — and they’re failing. Left-wing MSNBC host Rachel Maddow tried to protect the president’s reputation following Thursday’s release of special counsel Robert Hur’s report on his mishandling of classified documents. Hur’s report said the 81-year-old Biden likely would present himself to a jury as “a sympathetic, well-meaning, elderly man with a poor memory,” making a conviction unlikely. Maddow’s rejoinder: “He rides a bike.” That’s not only desperate, it’s stupid. Why? If a presidential candidate were required to be able to saf…