Former President Joe Biden is getting some sharp debating advice from a highly unlikely source. In an interview with NBC News, Trump ally and former House Speaker Newt Gingrich said that Biden could very easily deflect attacks about his age by claiming that his age has given him a wisdom that former President Donald Trump, despite being only three years younger, seems to lack. “If I were Biden, I would stay away from the age issue and just say, ‘Look, I was wise enough not to try to overthrow the U.S. government,’” he said. “Go through a list of five things in a row and say, ‘I would rather ha…