In instances of groupthink, what tends to occur when new information unfolds that challenges a group's initial beliefs?

Pressure is placed on dissenters to conform to beliefs

Explanation:

A groupthink is a psychological phenomenon that occurs within the groups of people and is associated with the desires of the harmony in the group and the decision-making outcomes and creates a unique and independent thinking and pressure is felt within the groups to focus on the new challenges of with there initial beliefs.

United states v.  nixon, 418  u.s.  683 (1974),  was  a landmark  united states supreme court case  that resulted in a unanimous  decision  against president richard  nixon, ordering him to deliver tape recordings  and  other subpoenaed materials to a  federal  district  court.