Charles Evans Hughes, Public Service Commission of Wisconsin v…
“ But the duty of the court in dealing with interlocutory applications, to which this court had previously directed attention, was not altered by the adoption of that rule. While an application for an interlocutory injunction does not involve a final determination of the merits, it does involve the exercise of a sound judicial discretion. That discretion can be exercised only upon a determination, in the light of the issues and of the facts presented, whether the complainant has made, or has failed to make, such a showing of the gravity of his complaint as to warrant interlocutory relief. ”
