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Amendment to the United States Constitution (1913) gave Congress the power to tax income.
Passed in 1913, this amendment to the Constitution calls for the direct election of senators by the voters instead of their election by state legislatures.
Amendment to the U.S. Constitution (1920) extended the right to vote to women in federal or state elections.
Sherman Antitrust Act
First federal action against monopolies, it was signed into law by Harrison and was extensively used by Theodore Roosevelt for trust-busting. However, it was initially misused against labor unions
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