In Constitutional law, the Last Resort Rule is a largely prudential rule which gives a federal court the power to avoid a constitutional issue in some circumstances. This rule dictates that, even if all other jurisdictional and justiciability obstacles are surmounted, federal courts still must avoid a constitutional issue if there is any other ground upon which to render a final judgment. The last resort rule can function as a distinct barrier to Constitutional avoidance. It is articulated by Justice Brandeis in Ashwander v. Tennessee Valley Authority.