Josh Hawley knows better about slavery and Juneteenth. But he just wants to fight

We’ve long since become accustomed to Sen. Josh Hawley’s online provocations. The Missouri Republican (or perhaps his staff) is a prolific poster, one who uses Twitter not to enlighten or inform his constituents but to start fights and stir up politically useful culture wars. For the most part, we prefer to ignore his endless trolling. Once in a while, however, Hawley posts something so mean-spirited and wildly at odds with known facts that we are compelled to respond. It happened again this week. Hawley on Monday acknowledged the national Juneteenth holiday — which celebrates the end of slave...