But even before Joe and Mika ended their daily broadcast, MSNBC and NBC both announced: "Mark Halperin is leaving his role as a contributor until the questions around his past conduct are fully understood." This is also a blow to Halperin's upcoming book and HBO movie about
Donald Trump's 2016 presidential campaign. "HBO," said the network in a statement, "is no longer proceeding with the project tied to the untitled book co-authored by Mark Halperin and John Heilemann on the 2016 Presidential election."