A law regulating the railroads was enacted in 1887 (Interstate Commerce act) and another, preventing large firms from controlling a single industry, in 1890 (Sherman Antitrust act).

1887年通过了对铁路部门实行调控的法案(州际商务法)，1890年通过了另一项防止大公司垄断某行业的法案(谢尔曼反托拉斯法)。

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Regardless of whether they knew it, the conspirators were violating the Sherman Antitrust Act, the federal law that seeks to protect free and vibrant competition in the United States.

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