What is the key significance of United States v. Lopez (1995)?

What is the key significance of United States v. Lopez (1995)?

• A. It upheld expansive federal power over interstate commerce.
• B. It limited Congress's power under the Commerce Clause by striking down the Gun-Free School Zones Act as exceeding federal authority.
• C. It established the supremacy of state laws over federal gun regulations.
• D. It allowed federal regulation of all activities regardless of commerce.

Answer: (B)

The main idea tested is the limits of Congress’s power under the Commerce Clause. United States v. Lopez held that Congress exceeded its authority when it enacted the Gun-Free School Zones Act, because simply possessing a gun in a school zone is not an economic activity that substantially affects interstate commerce. This ruling marked a notable limit on the broad use of the Commerce Clause that had characterized much of the 20th century, signaling a reassertion of state sovereignty in areas like criminal law. It clarifies that federal regulation under commerce powers hinges on activities that either affect the channels or instrumentalities of interstate commerce or have a substantial and causal link to economic activity across state lines; a purely local, non-economic act like gun possession in a school zone does not meet that test.

The main idea tested is the limits of Congress’s power under the Commerce Clause. United States v. Lopez held that Congress exceeded its authority when it enacted the Gun-Free School Zones Act, because simply possessing a gun in a school zone is not an economic activity that substantially affects interstate commerce. This ruling marked a notable limit on the broad use of the Commerce Clause that had characterized much of the 20th century, signaling a reassertion of state sovereignty in areas like criminal law. It clarifies that federal regulation under commerce powers hinges on activities that either affect the channels or instrumentalities of interstate commerce or have a substantial and causal link to economic activity across state lines; a purely local, non-economic act like gun possession in a school zone does not meet that test.