Hugo Black,
Leary v. United States (395 U.S. 6…
“ Under our system of separation of powers, Congress is just as incompetent to instruct the judge and jury in an American court what evidence is enough for conviction as the courts are to tell the Congress what policies it must adopt in writing criminal laws. The congressional presumption, therefore, violates the constitutional right of a defendant to be tried by jury in a court set up in accordance with the commands of the Constitution. ”
