Trump talked about disinfectants and UV rays being potential salves for the virus. There is proof emerging that is the case. Specify why you think it was a blunder for him to say so.
“Specify why you think it was a blunder for him to say so.”
There are a couple of possibilities that come to mind. It wasn’t a blunder, and he said he was being sarcastic. But, why be sarcastic when you’re right?
Or, it was a blunder, and he said he was being sarcastic to cover his blunder.