Does precluding a defendant from presenting any evidence of an affirmative defense of mental disease or defect to a jury based solely on conflicting expert testimony at a pre-trial hearing violate the Fourteenth Amendment's guarantee that an accused have a meaningful opportunity to present a complete defense.

Does precluding a defendant from presenting any evidence of an affirmative defense of mental disease or defect to a jury based solely on conflicting expert testimony at a pre-trial hearing violate the Fourteenth Amendment's guarantee that an accused have a meaningful opportunity to present a complete defense?