Lawyers for the American Liberty League challenged the validity of the Wagner Act (National Labor Relations Act), but in 1937, the United States Supreme Court upheld the constitutionality of the statute.
Advokater for American Liberty League satte spørgsmålstegn ved lovligheden af National Labor Relations Act, men i 1937, fastslog USA's højesteret, at loven ikke var i strid med forfatningen.