The preliminary injunction is an extraordinarily powerful remedy. After only an initial hearing, a court can command the nonmovant to perform-or to refrain from performing-an action, enforceable by criminal contempt. This supposedly temporary form of relief is often, in practical terms, dispositive of the case because the preliminary injunction remains in effect unless and until a subsequent decision vacates it.
Rachel A. Weisshaar,
Hazy Shades of Winter: Resolving the Circuit Split over Preliminary Injunctions,
65 Vanderbilt Law Review
Available at: https://scholarship.law.vanderbilt.edu/vlr/vol65/iss3/7