Where the Supreme Court has changed the substantive law governing a criminal case that is on direct appeal, must Griffith v. Kentucky be applied to the entire case?

QUESTIONS PRESENTED UESTION PRESENTED NO. 1 Where the Supreme Court has changed the substantive law governing a criminal case that is on direct appeal, must Griffith v. Kentucky be applied to the entire case? UESTION PRESENTED NO. 2 Where the Supreme Court has changed the substantive law governing a criminal case that is on direct appeal, should a de novo or plain error standard of review be applied when determining whether there was error in the proceedings below based on the new law, when the defendant could not have made particular objections in the trial court based on the new law?