Final answer:
The U.S. Supreme Court cases that endorse plea bargaining are Missouri v. Frye and Lafler v. Cooper. They address the rights of defendants in plea negotiations and the duty for competent legal counsel.
Step-by-step explanation:
Which U.S. Supreme Court cases endorse plea bargaining? The correct answer is D. Missouri v. Frye, Lafler v. Cooper. These two cases specifically addressed issues related to plea bargaining. Missouri v. Frye dealt with the right to competent legal counsel in the context of plea offers, while Lafler v. Cooper focused on the right to effective assistance of counsel during the plea-bargaining process. Both are significant in establishing defendants' rights in plea negotiations.
Gideon v. Wainwright is significant primarily for its delineation of the right to counsel for indigent defendants in felony cases, while Miranda v. Arizona established the requirement that suspects must be informed of their rights, including the right to an attorney, before police questioning. These rulings protect individual rights and set guidelines for law enforcement, but do not directly endorse plea bargaining.