Arianna Huffington and Roger Ailes have left the media companies they built mid-election. Five weeks ago, with the major-party conventions about to launch the most compelling general election season in recent memory, who could have imagined that two media titans with opposing stances on Donald Trump would leave the newsrooms they spent years building, long before the votes were counted? And yet, that is exactly what has happened, with Arianna Huffington's announcement Thursday that she will step down as editor in chief of the Huffington Post coming on the heels of Roger Ailes's ouster from the chairmanship of Fox News .