"Trade is a subject on which our current president considers himself particularly expert," John Oliver said on Sunday's Last Week Tonight. The problem is, President Trump "seems genuinely confused" by the basics of trade economics, including tariffs and trade deficits, he said, succinctly explaining both concepts for the edification of viewers and in case a certain president of the United States was hate-watching. To be fair, trade is "one of the most complicated issues there is, technically, politically, and emotionally," Oliver said, but Trump gets almost everything backwards.