The Democratic National Committee announced that Resistance Summer would begin in June. James Hodgkinson, a Bernie Sanders volunteer, delivered by opening fire on Republicans playing baseball. Hodgkinson had spent the weeks before the shooting staring at the site of his future attack and working on his laptop. What was he doing on his laptop? Ranting about Trump and Republicans. The left-wing terrorist who opened fire on Republicans practicing for a charity baseball game, an event to which they had brought their children, didnÂ’t come up with his own ideas. His Facebook pages were dumpsters rotting with reposted left-wing hate. There...