Which doctrine holds that government may not ban speech unless such speech poses an imminent threat?

• A. Exclusionary rule
• B. Clear and present danger doctrine
• C. Establishment clause
• D. Free exercise clause

Answer: (B)

The idea being tested is how free speech is limited when there is an immediate risk to public safety, captured by the clear and present danger doctrine. This standard holds that government may restrict speech only if it would create a real, imminent threat of illegal action—the danger must be near enough in time and probability that banning the speech is necessary to prevent the harm. It originated in early First Amendment cases like Schenck v. United States and shaped how courts balance protecting expression with preventing harm. While later cases refined the test toward imminent lawless action, the core concept remains that restrictions hinge on an imminent risk. The other options concern different constitutional rules: the exclusionary rule deals with evidence in court, the Establishment Clause with keeping government from favoring religion, and the Free Exercise Clause with protecting religious practice.