What is the difference between acting...

Instead of talking about whether the president of the United States hurts himself politically by acting like a deranged lunatic, why don’t we talk about the fact that he *is* a deranged lunatic?

That would seem to be the more significant question. https://t.co/37bB2puDyf

— George Conway (@gtconway3d) December 28, 2019

...and being?