US Presidency
1879

And be it further enacted, That whenever the laws of the United States shall be opposed or the execution thereof obstructed in any State by combinations too powerful to be suppressed by the ordinary course of judicial proceedings or by the powers vested in the marshals by this act, the same being notified to the President of the United States by an associate justice or the district judge, it shall be lawful for the President of the United States to call forth the militia of such State to suppress such combinations and to cause the laws to be duly executed.