A political trial is a criminal trial with political implications. A composite definition of a political trial might be "an examination before a court concerning the conduct of governmental affairs or somehow relating to government." T. Becker writes that "in a sense, all trials are political. Since courts are government agencies and judges are part of the 'system' all judicial decisions can be considered political." A political trial is characterized by the fact that public opinion and public attitudes on one or more social questions will inevitably have an effect on the decision.
Political trials can include trials for civil disobedience and other forms of protest against government policy. The government may use prosecution to frighten potential supporters and sympathizers of a movement, and to discredit a movement and compel its members to spend time, money and energy avoiding conviction and imprisonment. A defendant in a political trial may offer a "legal defense" or a "political defense". A technical defense would argue that the alleged crime did not occur as a matter of fact or law. In a political defense, a defendant may assert the political motivations behind the conduct in an attempt to convince the jury or the public of the justness of the political motivations and of the injustice of the prosecution.
There is some question as to whether political trials are necessary or if they are a disease of politics and law. Political justice is defined in terms of the state's reaction to perceived threat; and political prisoners are defined as those incarcerated because of either political crime (political criminals) or political justice (victims of repression).
Defendants in political trials tend to participate in the proceedings more than defendants in non-political cases, as they may have greater ability to depart from courtroom norms to speak to political and moral issues. It has been suggested that in political cases, justice will be better served if the lists used to impanel jurors are more complete and if challenges and excuses are minimized, in order to ensure that the jury more accurately reflects the diversity of the community.