TRUMP release your tax returns!
Trump is a liar, a black liar and he is hiding something.
Black lies are about simple and callous selfishness. We tell black lies when others gain nothing and the sole purpose is either to get ourselves out of trouble (reducing harm against ourselves) or to gain something we desire (increasing benefits for ourselves).
The worst black lies are very harmful for others. Perhaps the very worst gain us a little yet harm others a great deal.