The question presented is whether there is a constitutional exception to the
no-impeachment rule codified in Federal Rule of Evidence 606(b) for instances
where there is evidence that the jury considered evidence in violation of a criminal
defendant's Fifth Amendment due process rights, including the right against self-incrimination, and Sixth Amendment fair trial rights?

Whether there is a constitutional exception to the no-impeachment rule codified in Federal Rule of Evidence 606(b) for instances where there is evidence that the jury considered evidence in violation of a criminal defendant's Fifth Amendment due process rights, including the right against self-incrimination, and Sixth Amendment fair trial rights