The excerpt from the U.S. Constitution refers to the power of Congress to regulate commerce. This provision is associated with the foundational principles established in the Constitution, which was enacted in 1787. Therefore, this excerpt is not directly associated with any of the specific eras like the Progressive Era, New Deal Era, Laissez-Faire Era, or Post-World War II Era, all of which refer to more contemporary economic and social reforms or policies.
However, if you must choose one from the provided options, the Progressive Era could be seen as a time when the federal government began taking a more active role in regulating various aspects of commerce and industry, responding to the challenges of rapid industrialization and economic change in the late 19th and early 20th centuries. Thus, the closest association among the options provided would be:
Progressive Era