The Washington Post's Paul Farhi explains what's next for Fox News and the Murdoch family, now that Chairman and CEO Roger Ailes has left the network. (Video: Peter Stevenson, Jorge Ribas/The Washington Post)

Update: Fox announced Thursday that Roger Ailes had resigned as chairman and CEO "effective immediately," with Rupert Murdoch assuming the role of chairman and acting CEO.

Roger Ailes is out as chief executive of Fox News — a monumental development at any time that looms even larger in an election year. In two decades of leadership, Ailes built the cable news channel into the popular and polarizing media behemoth it is today. The former Republican operative created a go-to forum for conservative perspective, in addition to straight news, that resonated with viewers who see a liberal slant in the rest of the mainstream media.