18 million watched Harris, Biden face-off in highest-rated Democratic primary debate ever

Thursday night’s Democratic debate featuring Kamala Harris, Joe Biden, and eight other candidates was the highest-rated Democratic match-up in Nielsen ratings history.

About 18.1 million viewers tuned in for the debate across three TV channels — NBC, MSNBC and Telemundo — according to Nielsen (NLSN) data. CONT.

Brian Stelter, CNN Business