A party-line vote in a deliberative assembly (such as a constituent assembly, parliament, or legislature) is a vote in which a substantial majority of members of a political party vote the same way (usually in opposition to the other political party(ies) whose members vote the opposite way).
In a 2005 decision called Roper v. Simmons, the Supreme Court of the United States ruled that the execution of people who were under 18 at the time of their crimes violates the federal constitutional guarantee against cruel and unusual punishments.
