On Monday, the Supreme Court will hear arguments in a pair of cases out of Texas and Florida that could force major social media platforms to carry posts from Donald Trump or others who lie about elections being stolen or obliquely encourage election-related violence. A ruling in favor of these states would turn the First Amendment upside down and create the conditions for undermining American democracy. If there wasn’t so much else swirling around our elections and democracy right now, this case would be commanding everyone’s attention. Moody v. NetChoice LLC and NetChoice LLC v. Paxton arise out of the...