“Charlie Kirk’s Death and the Coming Civil War,” tweeted Russian ultranationalist Alexander Dugin, whose influence earned him the moniker “Putin’s brain‚” referring to Russia’s president. Pro-Russian bots blamed Democrats and predicted more violence. Russian state media published English-language articles with headlines claiming a conspiracy orchestrated by shadowy forces: “Was Charlie Kirk’s Killer a Pro?” Foreign disinformation makes up a tiny fraction of the overall online discussion about Kirk’s death, but it could undermine any efforts to heal political divisions or even spur further violence. “We’ve seen multiple Russian campaigns attempting to exploit” Kirk’s killing, said Joseph Bodnar, senior research manager...