Call it BS and then ask which test? First get the facts and then decide if you want to start name calling.
I wish he started off with more detail, and I anticipate it is forthcoming. Dr. Krammer is a highly regarded virologist though and has published guidelines for serology of COVID-19 so if he has an issue with the data I assume it has some basis.
Also, in general, I would prefer new medical findings to be communicated by medical doctors, virologists, and epidemiologists with the proper amount of context and caveats, as opposed to chief executives.(This goes for both the state and federal government...)