"Oh! What A Tangled Web We Weave When First We Practice To Deceive"
It is America's shame that our President has had so little regard for the truth that the American people learned a long time ago they could not trust anything he says.
How do we know Trump tested positive for the coronavirus? Trump told us in a tweet.

Donald J. Trump
@realDonaldTrump
Tonight,
@FLOTUS and I tested positive for COVID-19. We will begin our quarantine and recovery process immediately. We will get through this TOGETHER!
9:54 PM · Oct 1, 2020
That is it. We have not heard from the White House task force on the virus. We have not heard from epidemiology experts from the team as in the case of Drs. Fauci and Birx. We have not heard from any independent medical expert that Trump tested poswitive. We have only Trump's word on that, and his word isn't worth much.
We have only heard from White House stooges, Trump's doctor, who will say whatever Trump wants him to say, MeEnamy, who lies as often as Trump himself, Meadows, Trump's chief of staff, and the idiot, Kudlow.
Why would Trump want to lie about testing positive? One reason might be, he has lied so much, he no longer knows what reality is any more.
That said, I will try to be more specific. Trump can lie all he wants, but he is not stupid, and he can read the headlines. He failed miserably during the Presidential debate. After acting like a complete jerk, there is no way Mary Wonderful, living in Suburbia, USA, would vote for the loudmouth idiot, and she will drag her husband with her. Now they are going to change the rules, insisting on decorum. Trump wants no part of decorum. He wants out of the debates before he injures himself anymore.
Trump was supposed to appear for two political rallies in Wisconsin on Saturday. He was drawing a lot of heat. In fact, Trump got booted out of one Wisconsin town, La Crosse. Perhaps Trump didn't want to embarrass himself anymore.
There is a strong possibility that GOP leaders told Trump Trump to cool it. Trump's speeches, like the one he gave in Duluth, were getting embarrassing. They worked great at solidifying the white supremacists and far right extremists who are part of Trump's base, but they totally turned off everyone else.
GOP leaders may have thought keeping Trump off the campaign trail, shutting him up, could do wonders for the Trump campaign and help their own chances as well. Trump was becoming a disgrace, and that wasn't helping Republicans up for reelection.
Tweeting that he had tested positive for the coronavirus would accomplish all of those goals.
Trump was the host of a reality show. During that stint and during his Presidency, Trump learned to become a master of melodrama. He can't just say he tested positive. He had to make this a big production for the drama effect.
What better way than to arrange to have Marine One fly him to Walter Reed, where he will stay for a few days to convince the doubters this was not all for show.
Doubters like me.