Biden-Sanders Democratic debate watched by 9.9 million on CNN

Biden-Sanders Democratic debate watched by 9.9 million on CNN

The Democratic debate between former Vice President Joe BidenJoe BidenPresidents and 'presidents' Biden to blast Trump's church photo op in Philadelphia speech Rudy Giuliani calls on Cuomo to remove Bill de Blasio MORE and Sen. Bernie SandersBernie SandersFive things to watch in Tuesday's primaries Nina Turner responds to Cornel West's remarks about George Floyd COVID-19 pandemic will shrink economy by trillion in next decade: CBO MORE (I-Vt.) was watched by a total of 9.9 million viewers on CNN Sunday night, with an additional 844,000 viewers tuning into Univision, according to Nielsen Media Research. 

The debate moderated by CNN's "State of the Union" anchor Jake TapperJacob (Jake) Paul TapperNational security adviser blames 'a few bad apples,' says there's not systemic racism in law enforcement CNN's Jake Tapper slams 'Trump's unprecedented war on accountability' Ron Johnson says he's not 'crying big crocodile tears' over firing of State Department IG MORE and chief political correspondent Dana BashDana BashBiden accuses Trump of 'stoking deaths,' being 'falsely masculine' Demings 'concerned' over theme park openings in Florida Demings hits Trump for campaigning off Biden 'you ain't black' comments MORE, and Univision political correspondent Ilia Calderón, was dominated by questions concerning the coronavirus pandemic gripping the country. 

It also marked the first presidential debate since John KennedyJohn Neely KennedyMORE squared off against Richard Nixon in 1960 where an audience wasn't present for the proceedings due to the coronavirus precautions.  

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The last Democratic debate, which took place before Super Tuesday on Feb. 25, drew 15.3 million viewers on CBS. 

Prior to that, the Feb. 18 Democratic debate from Las Vegas on NBC and MSNBC delivered a record for a Democratic debate, with 19.7 million viewers. The event marked the debate debut of former New York City mayor Michael BloombergMichael BloombergIt's as if a Trump operative infiltrated the Democratic primary process Liberals embrace super PACs they once shunned .7 billion expected to be spent in 2020 campaign despite coronavirus: report MORE

The most watched primary debate of all time occurred in 2015 for the GOP debate featuring then-candidate Donald TrumpDonald John TrumpSessions accepts 'Fox News Sunday' invitation to debate, Tuberville declines Priest among those police cleared from St. John's Church patio for Trump visit Trump criticizes CNN on split-screen audio of Rose Garden address, protesters clashing with police MORE in August of that year, which registered more than 24 million viewers on Fox News. 

Voters go to the polls on Tuesday in four states: Florida, Illinois, Ohio and Arizona. 

Two states, Louisiana and Georgia, further down the primary calendar have postponed their respective contests amid the spread of the coronavirus.