At a time when so many forces seem to be dividing us as a nation, it is tragic that President Trump seeks to co-opt or destroy whatever remaining threads unite us. I refer, of course, to the U.S. men’s Olympic hockey team winning gold: the kind of victory that normally causes Americans to forget their differences and instead focus on something wholesome, like chanting “USA” while mispronouncing the names of the European players we defeated before taking on Canada. This should have been pure civic oxygen. Instead, we got video of Kash Patel pounding beers with the players — which is not illegal, but does make you wonder whether the head of the Federal Bureau of Investigation has a desk somewhere with neglected paperwork that might hold the answers to the D.B. Cooper mystery. Then came the presidential phone call to the men’s team, during which Trump joked about having to invite the women’s team to the State of the Union, too, or risk impeachment — the sort of sexist humor that lands best if …