new york/los angeles first presidential debate democrat hillary clinton republican donald trump draw 84 million u.s. television viewers record event number rarely see tv age digital stream social media audience monday night face-off beat 1980 record 80.6 million set jimmy carter-ronald reagan presidential debate viewers far few entertainment options fell short 100 million viewers analysts predict estimate rat figure nielsen include people watch raucous encounter across 13 u.s. cable broadcast network public television station pbs tv figure include millions people watch debate online twitter twtr.n facebook fb.o social media include large group bar restaurants alphabet inc googl.o youtube report nearly million live concurrent stream debate platform national football league annual super bowl attract 100 million viewers make big u.s. tv event monday debate first three schedule clinton trump nov. election two set oct. 19. fox news channel foxa.o grab big cable audience average 11.4 million viewers early nielsen data show nbc cmsca.o whose nightly news anchor holt moderate contentious exchange race economy national security first overall estimate audience 18.2 million tv network promote debate days beforehand report strong demand compare four years ago commercial time pre- post-debate program ad rat far high typical news program cnn twx.n charge 55,000 30-second ad spot part package range 800,000 million include future debate election night accord person knowledge matter cbs cbs.n charge 200,000 225,000 accord another source cnn cbs limit availability leave next debate oct. source say clearly debate really well last night say michael law manage director video investments dentsu aegis network law say expect ad rat next debate would rise significantly base monday night audience oct. face-off air nfl matchup two popular team green bay packers new york giants nfl likely well night probably see fall-off 90 minutes debate law say trump-clinton showdown break tv debate rat record 84 million watch