As large firms merged with competitors to form giant companies that dominated the marketplace, opponents of such trusts decried the power that these enterprises wielded over the economy and the political system. Responding to such concerns, Congress passed the Sherman Antitrust Act in 1890, but the law proved weak and was loosely enforced. In the following illustration, cartoonist Horace Taylor, a Democrat, sought to make trusts an issue in the 1900 election by attacking John D. Rockefeller, whose Standard Oil Company embodied the evils of trusts for many critics.
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