In the case of New Jersey et al. v. Russo et al., 1965, the Supreme Court was asked to consider whether a state could legally require its public employees to take an oath swearing they were not members of any group advocating for the violent overthrow of government as a condition of employment. The defendants in this case were teachers who had been dismissed from their jobs because they refused to take such an oath. They argued that it violated their First Amendment rights and constituted unlawful discrimination against them based on their political beliefs. The Supreme Court ruled in favor of the defendants, finding that requiring public employees to swear such an oath did indeed violate their constitutional rights under both the First and Fourteenth Amendments. It held that while states have a legitimate interest in ensuring loyalty among public servants, this cannot be achieved by infringing upon individuals' freedom of speech or association.

In the dissenting opinion for New Jersey v. Russo, it was argued that the majority's decision to uphold a conviction based on evidence obtained through an unauthorized wiretap violated the Fourth Amendment rights of the defendants. The dissenting justices believed that allowing such evidence would set a dangerous precedent and undermine citizens' protection against unreasonable searches and seizures. They contended that any information gathered without proper authorization should be considered inadmissible in court, regardless of its relevance or importance to a case. This view emphasized upholding constitutional protections over achieving prosecutorial success at all costs.