Many people will occasionally speak facetiously.

All too often, Donald Trump speaks fascistiously.

You can quote me on that.  I know, Merriam-Webster may not like my word, but I think it is better than the one they use, and mine works better above.

It seems to me that more often than not, when the White House has to walk back something Trump said and explain it away as a joke, whatever he said was quite the opposite of a joke.