That appears to have been a misreading of the actual report, which was headlined, "Bernie Sanders suspends his 2020 campaign Facebook ads". "Pete Buttigieg and Michael Bloomberg made their Facebook ads inactive hours before they suspended their campaigns".
However, Mr Sanders is himself under growing pressure to drop out after disappointing results in states that voted recently.
Dennis Kucinich, a former Democratic congressman from OH, didn't officially drop out of the 2004 primary until just days before the party's summer convention, when John Kerry won the nomination.
"The reason I have not dropped out of the race is that we may have a nominee, but the future direction of the Democratic Party has not yet been determined", he told The New York Times at the time.
But the new coronavirus has upended the race and forced both candidates off the campaign trail.
Mike DeWine to postpone the state's primary, on the grounds of preventing the spread of coronavirus, only delayed Biden's near-certain clinching of the prize.
Biden announced Jen O'Malley Dillon, a veteran Democratic operative, as his new campaign manager on March 12, two days after another round of primary victories widened his lead over Sanders.
"Let me say, especially to the young voters who have been inspired by Senator Sanders: I hear you".
She became embroiled in an ugly war of words in October after 2016 Democratic presidential candidate Hillary Clinton said Gabbard was being "groomed" to disrupt the 2020 election as a third-party candidate. "I know what is at stake".
"Three weeks ago, we were on the verge of collapse as a campaign, so this is a very recent phenomenon", said Biden senior adviser Anita Dunn, insisting that the 77-year-old candidate remains focused on playing a productive role in the coronavirus response and sewing up a nominating fight that he doesn't see as finished.
"We are really looking forward to convening with you virtually".
In a Democratic race once defined by such rabble-rousing outsiders as senators Mr Sanders and Elizabeth Warren, Mr Biden has trumpeted his many decades in government to project the image of calm amid a national emergency.
Sen. Sherrod Brown (D-Ohio) said on MSNBC that he believed DeWine, a Republican, acted "in totally good faith", but expressed worry about "any precedent" the cancellation might set.
"After she was treated so shamefully by the national committee, I don't understand why she's staying".