By Julian Zelizer, CNN Political Analyst
CNN
January 13, 2018
During a conversation with David Letterman on his new Netflix program, former President Barack Obama issued a stern warning for the current commander in chief: “One of the things that Michelle figured out, in some ways faster than I did, was part of your ability to lead the country doesn’t have to do with legislation, doesn’t have to do with regulations, it has to do with shaping attitudes, shaping culture, increasing awareness.” Although Obama was extremely hesitant about directly commenting about President Donald Trump, the message he sent was clear.