May courts continue to treat fundamental and enumerated rights as mere guidelines to be discarded when inconvenient?

Question Presented The rights to compel favorable witnesses and present a defense are fundamental to our system of justice, and predate our constitution. Yet these rights are routinely subjugated to rules of evidence, and these decisions are most frequently reviewed only for an appropriate exercise of judicial discretion. May courts continue to treat fundamental and enumerated rights as mere guidelines to be discarded when inconvenient? 1