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As interest in the aftermath of the Ferguson shooting case ruling continued on Tuesday, CNN scored a rare ratings feat by winning every hour of the day in the key news demo.

Nielsen estimates that CNN’s coverage of the protests to denounce a Grand Jury decision not to indict Ferguson, Missouri, police officer Darren Wilson averaged 663,000 adults 25-54 on a total-day basis and 861,000 in primetime — more than four times its tallies of the previous Tuesday. Usual ratings leader Fox News placed second (430,000 and 718,000), and MSNBC was a distant third (151,000 and 233,000).

Peak viewership in the demo came for CNN during the 11 p.m. ET hour with “CNN Tonight” (981,000 adults 25-54 and 1.822 million viewers overall). And at Fox, the 9 p.m. ET telecast of “The Kelly File” was tops in the demo (767,000) while “The O’Reilly Factor” at 8 p.m. ET drew the most total viewers (3.386 million).

Fox News still held a sizable advantage in total viewers, averaging 1.775 million in total day (to 1.384 million for CNN) and 2.983 million in primetime (to 1.638 million for CNN).

Overall primetime viewership subsided Tuesday, as Fox News, CNN, MSNBC and HLN combined to average about 5.6 million viewers — less than half the 12.8 million that tuned in on average from 8 to 11 on Monday when the Grand Jury announcement was made.