What did the USSC say about plea bargaining in Blackledge v Allison?

In Blackledge v. Allison (1977), the U.S. Supreme Court held that a defendant's due process rights can be violated if a prosecutor threatens harsher punishment after a defendant exercises their right to appeal. The Court emphasized that such actions could create an unfair coercion in the plea bargaining process, undermining the integrity of the legal system. The ruling underscored the importance of protecting a defendant's right to make informed decisions regarding their plea without fear of retaliatory action.