Any time Trump tweets something outrageous like this, it's useful to see what he's trying to distract us from.Trump tweets ...
With Universal Mail-In Voting (not Absentee Voting, which is good), 2020 will be the most INACCURATE & FRAUDULENT Election in history. It will be a great embarrassment to the USA. Delay the Election until people can properly, securely and safely vote???
-- from @realDonaldTrump
Democracy is in the crosshairs.
In this case, it seems the thing he was trying to push out of the news cycle was the announcement that came out about 15 minutes before his tweet:
America's economy just had its worst quarter on record - CNN
Trump, who styles himself an economic genius and the most pro-business president ever, is presiding over the worst economic downtown in the history of the United States.
He wants to hide this fact, so he says things that he knows will push this testament to his incompetence out of the headlines.