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The constitution gives expressed powers to congress in Article 1, section 8.
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Supreme Court upholds the concept of implied powers, declaring that the powers to tax, borrow, and regulate commerce to establish a national bank.
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Supreme Court rejects State efforts to regulate immigration, declaring it a Congressional Issue.
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The U.S government issues its first legal tender notes, which are popularly called greenbacks.
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The Sherman Antitrust Act, based on the commerce power, regulates monopolies and other practices that limit competition.
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The Wagner Act, based on the commerce power, recognizes labor's right to bargain collectively. The Social Security Act is passed.
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The Interstate and National Highway Act, based on the commerce and war powers, provides for a national interstate highway system.
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Congress amends the Social Security Act of 1935 to create Medicare, which covers hospitals and other health-care costs of the elderly.
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The Americans with Disabilities Act, based on the commerce power, prohibits discrimination against the physically impaired.
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In the United States v. Lopez, the Court strikes down the Gun-Free School Zone Act of 1990 on the grounds that the federal government invades reserved powers of the states with this legislation.