 Take it seriously. Harris would be hard to stop, perhaps impossible, if the Obamas and Clintons joined Biden, Representative James Clyburn, and the Congressional Black Caucus in backing her. It's not clear if the coordination would be so fast and clear, however. Okay. Now, Mark Halperin, who is a very prominent journalist, has a lot of access to liberal sources, wrote that book Game Change back in 2009, 2010. This is breaking news.