Americans who watched the political conventions on television opted for news networks with partisan fan bases to a degree unseen in recent years, another sign of an increasingly divided electorate as the nation hurtles toward the November election.
Fox News, whose prime time is a destination for conservatives, accounted for close to half — 45 percent — of the viewership of the Republican National Convention this week across the six major news networks, Nielsen said on Friday. In 2016, that figure was about 30 percent; in 2012, 36 percent.
MSNBC, whose prime time is popular with liberals, accounted for about

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