No. The US Supreme Court upheld the constitutionality of the National Labor Relations Act of 1935 (aka Wagner Act) that prevented private industry from penalizing or discriminating against unions and labor organization in the case National Labor Relations Board v. Jones & Laughlin Steel Corporation, 301 U.S. 1 (1937). Five of the nine justices held there was a legitimate connection to interstate commerce, allowing Congress the authority to pass legislation regulating certain aspects of the labor-industry relationship.

The Supreme Court declared the National Recovery Administration unconstitutional in 1935; the Wagner Act was the first piece of New Deal legislation the Court upheld, signaling a change in the Supreme Court's support of Roosevelt's economic policies.

Case Citation:

National Labor Relations Board v. Jones & Laughlin Steel Corporation, 301 U.S. 1 (1937)

National Labor Relations Board v. Jones & Laughlin Steel Corporation, 301 U.S. 1 (1937)

The case was to determine if the National Labor Relations Act of 1935 was constitutional.

NLRB was upheld. Chief Justice Charles Evans Hughes wrote, "Although activities may be intrastate in character when separately considered, if they have such a close and substantial relation to interstate commerce that their control is essential or appropriate to protect that commerce from burdens and obstructions, Congress cannot be denied the power to exercise that control." Their decision reversed a lower court ruling.