On Sunday morning, President Trump retweeted a GIF featuring a doctored video of him striking Hillary Clinton with a golf ball that was originally posted by a user named “Fuctupmind.” That user has posted many racist tweets about the Obama family, along with Islamophobic and anti-Semitic memes.
In recent weeks, Trump has repeatedly retweeted bigots, accounts that traffic in wild conspiracy theories, and memes depicting violence against his perceived enemies.
Trump...