Former Republican presidential candidate Ron Paul tweeted out a racist and anti-Semitic cartoon Monday before swiftly deleting it amid a backlash on social media. The cartoon featured a range of minorities depicted in stereotypical terms—including a Jewish man with a hooked nose, a black man with large lips as well as portrayals of Asians and Latinos. The four men are shown punching up at an Uncle Sam figure together with a speech bubble that reads, “Cultural Marxism!” Together, with the cartoon, Paul wrote: “Are you stunned by what has become of American culture? Well, it’s not an accident. You’ve probably...