社会主義者鎮圧法
The years 1880 and 1881 saw a new influx of political refugees from Germany, activists in the socialist movement fleeing the crackdown on radicalism launched with the Anti-Socialist Laws of 1878. This influx of new German members, coming during a time of low ebb of the English-speaking membership, extended Germanic influence in the SLP. Excluded from the voting booth by their lack of citizenship status, many of the newcomers had little use for electoral politics. An SLP German militia sued on Second Amendment grounds to keep and bear arms in Chicago parades. However, the Supreme Court ruled against them in "Presser v. Illinois".