Both Fox News’ Tucker Carlson and CNN’s Don Lemon parted ways with their respective networks this past Monday, and there is certainly some accidental symbolism in these concurrent oustings. Their departures open the last chapter in the histories of these dual titans among American TV networks. While the networks were founded in different technological eras with different professional ideologies, they became similar as they lived through the same climate changes that converged their journalistic approaches. Their histories have had many parallels; now, it seems they are coming to an end in parallel, too.