With interest down sharply across the board in television coverage of the midterm elections, Fox News had about as big a night as the Republican Party, drawing the biggest audience not only in cable but also beating the broadcast networks’ limited coverage.

Fox News labeled the victory historic, because though the network also had the most viewers in 2010, the last time Republicans scored sweeping victories in the midterms, this time, during the 10 p.m. hour, Fox also managed to beat all its competitors in the category preferred by news advertisers, viewers between the ages of 25 and 54.

But in a sign of the depth of the lack of interest in this election — or perhaps politics in general — every network was down substantially from its viewing levels of four years ago. That included Fox News, which despite being able to report on coast-to-coast victories for the party supported by most of its viewers, was down about 10 percent in total viewers and 32 percent among the viewers that news advertisers pay for.

Other totals last night reflected the lax interest in the results. CNN and MSNBC were both down 13 percent in total viewers. CNN was down 12 percent in the 25-54 group; MSNBC was down 22 percent.