Unknown to most Americans, a parallel legal regime allows the president to sidestep many of the constraints that normally apply. The moment the president declares a “national emergency”—a decision that is entirely within his discretion—more than 100 special provisions become available to him. While many of these tee up reasonable responses to genuine emergencies, some appear dangerously suited to a leader bent on amassing or retaining power. For instance, the president can, with the flick of his pen, activate laws allowing him to shut down many kinds of electronic communications inside the United States or freeze Americans’ bank accounts. Other powers are available even without a declaration of emergency, including laws that allow the president to deploy troops inside the country to subdue domestic unrest.

This edifice of extraordinary powers has historically rested on the assumption that the president will act in the country’s best interest when using them. With a handful of noteworthy exceptions, this assumption has held up. But what if a president, backed into a corner and facing electoral defeat or impeachment, were to declare an emergency for the sake of holding on to power? In that scenario, our laws and institutions might not save us from a presidential power grab. They might be what takes us down.

[...]

Complete control of internet content would not be necessary for Trump’s purposes; even with less comprehensive interventions, he could do a great deal to disrupt political discourse and hinder effective, organized political opposition. And the Supreme Court’s view of the First Amendment is not immutable. For much of the country’s history, the Court was willing to tolerate significant encroachments on free speech during wartime. “The progress we have made is fragile,” Geoffrey R. Stone, a constitutional-law scholar at the University of Chicago, has written. “It would not take much to upset the current understanding of the First Amendment.” Indeed, all it would take is five Supreme Court justices whose commitment to presidential power exceeds their commitment to individual liberties.

Read more at The Atlantic