tweeted a satirical news story, believing it to be real?

On October 16, 2020, Trump tweeted a story from a satire site which claimed that Twitter shut itself down to slow the spread of negative news about opponent Joe Biden.

An excerpt from the referenced story reads,

After seeing account after account tweet out one particularly bad story, CEO Jack Dorsey realized he had to take action. Dorsey smashed a glass box in his office reading “Break In Case Of Bad Publicity For Democrats.” Inside the case was a sledgehammer for smashing Twitter’s servers.

“Red alert — shut the servers down! Shut them all down!”

The Babylon Bee’s Twitter responded to Trump’s support.

The Babylon Bee – Twitter Shuts Down Entire Network To Slow Spread Of Negative Biden News
Newsweek – The Babylon Bee Wasted No Time Trolling Trump After He Tweeted Its Satirical Article as News
Wikipedia – The Babylon Bee