Answer: The Erdman Act is Unconstitutional because a) it interfered in due process of law and e) it interfered with workers and employers and their right to enter into contracts.
Explanation: In Adair v. United States (1908) the US Supreme Court declared that bans that forbade workers from joining labor unionrs were unconstitutional, because it was limitating the right and freedom of contract of the workers. This decision reaffirmed that freedom.
Answer 7: 10.