No officer should be required or permitted to take part in the management of political organizations, caucuses, conventions, or election campaigns. Their right to vote and to express their views on public questions, either orally or through the press, is not denied, provided it does not interfere with the discharge of their official duties. No assessment for political purposes on officers or subordinates should be allowed.

Rutherford B. Hayes, 1822-1893: chronology, documents, bibliographical aids (ed. Oceana Pubns, 1969)