the United States, in the execution of process or otherwise, or who by any of the means before mentioned hinders or prevents the free attendance and presence at such places of registration, or at such polls of election, or full and free access and egress to and from any such place of registration or poll of election, or in going to and from any such place of registration or poll of election, or to and from any room where any such registration or election or canvass of votes, or of making any returns or certificates thereof, may be had, or who molests, interferes with, removes, or ejects from any such place of registration or poll of election, or of canvassing votes cast thereat, or of making returns or certificates thereof, any supervisor of election, the marshal or his general or special deputies, or either of them, or who threatens, or attempts or offers so to do, or refuses or neglects to aid and assist any supervisor of election, or the marshal or his general or special deputies, or either of them, in the performance of his or their duties, when required by him or them, or either of them, to give such aid and assistance, shall be liable to instant arrest without process, and shall be punished by imprisonment not more than two years, or by a fine of not more than $3,000, or by both such fine and imprisonment, and shall pay the cost of the prosecution.

The Supreme Court of the United States, in the recent case of Ex parte Siebold and others, decided at the October term, 1879, on the question raised in the case as to the constitutionality of the sections of the Revised Statutes above quoted, uses the following language: 

These portions of the Revised Statutes are taken from the act commonly known as the enforcement act, approved May 31, 1870, and entitled “An act to enforce the right of citizens of the United States to vote in the several States of this Union, and for other purposes,” and from the supplement to that act, approved February 28, 1871.  They relate to elections of members of the House of Representatives, and were an assertion on the part of Congress of a power to pass laws for regulating and superintending said elections and for securing the purity thereof and the rights of citizens to vote thereat peaceably and without molestation.

It must be conceded to be a most important power, and of a fundamental character.  In the light of recent history and of the violence, fraud, corruption, and irregularity which have frequently prevailed at such elections, it may easily be conceived that the exertion of the power, if it exists, may be necessary to the stability of our form of government.

  The greatest difficulty in coming to a just conclusion arises
  from mistaken notions with regard to the relations which
  subsist between the State and National Governments. * * *