It was the first time Facebook has removed a post by Trump's campaign for spreading misinformation about the coronavirus, although the social network has previously taken down other ads and posts by the campaign for violating other policies.
The move came as Facebook faces pressure to prevent the spread of misinformation while simultaneously being accused of silencing viewpoints by calling for posts to be truthful.
The DNC was forced to delete the tweet before it could post again, the committee said. Both social-media companies have policies that forbid sharing misleading information about the coronavirus that could cause people harm. Instead, as the Washington Post now reports, it was the account of the Trump team, @TeamTrump, that was temporarily banned.
"My view is that schools should be open", Trump said.
Spokespeople for the White House and the Trump campaign didn't immediately respond to requests for comment.
He said on Twitter: "The Twitter employee who announced to the world why the Team Trump account was briefly suspended is also Kamala Harris's former press secretary". The company said in a statement late Wednesday that the tweet violated its rules against COVID misinformation. "They just don't have a problem", Trump told Fox & Friends.
The same clip was also posted on Twitter by the Trump campaign and later shared from the president's main account.
The Trump campaign said in a widely-reported statement that Trump "was stating a fact that children are less susceptible to the coronavirus".
Children can catch and transmit the virus, but they run an extremely low risk of becoming ill from it.
A recent study suggested that children under the age of five may carry the virus at higher levels than adults.
In the interview, which aired Wednesday morning, Trump said children should return to school because they are "almost immune" or "virtually immune" to the disease.