Here are some just off the top of my head.
1.Sunlight/UV kills the virus. 2.Virus came from a lab in china. 3.HCQ and other therapeutics work. 4.Russians didn't have bounties on soldiers. 5.Rioters throwing soup cans saying "its just food for my family"
Please add more to the list.
Biden is shot.
Fake Buyden is being controlled by the Cabal.
"It is going to get cooler." To fire responders complaining about global warming.
Everything
The list is long.. how much space we allowed to take up on this site?
Almost everything. Some exceptions just to be reasonable: the vaccine and bump stocks (basically any time he tried to appease the left). Things I can remember immediately: big tech, journalists being hacks, the need for a wall, China being a massive threat, deregulation, Mike Pence being a pussy, and a desperate need to drain the swamp.
Hillary is Crooked
There were fine people on both sides.
Dems were eavesdropping on his campaign
Comey was a lying sleazebag
Obama's Birth Certificate was fraudulent
The better question would be "What has Trump claimed that has turned out to be false ?"