In discourse, a heckler’s veto is a situation in which a party who disagrees with a speaker’s message is able to unilaterally trigger events that result in the speaker being silenced. For example, a heckler can disrupt a speech to the point that the speech is canceled.

In the legal sense, a heckler’s veto occurs when the speaker’s right is curtailed or restricted by the government in order to prevent a reacting party’s behavior. The common example is the termination of a speech or demonstration in the interest of maintaining the public peace based on the anticipated negative reaction of someone opposed to that speech or demonstration.

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