Final answer:
Previous court findings regarding the federal role in interstate commerce have varied over time, with different interpretations of the commerce clause. There have been periods of both broad and narrow interpretation.
Step-by-step explanation:
Previous court findings regarding the federal role in interstate commerce have varied over time. In the earliest days of the republic until the end of the 19th century, the Supreme Court consistently handed down decisions that broadened Congress's power to regulate interstate and intrastate commerce. However, during the 1930s, there was a period of narrow interpretation of the commerce clause, followed by a swing in an even-broader direction. Since then, the court's interpretation has shifted depending on the specific case.