Every citizen of the United States of the age of 18 years and upwards, excepting persons under guardianship for reasons of mental illness, having his or her residence established in this State, shall be an elector for Governor, Senators and Representatives, in the city, town or plantation where his or her residence has been established, if he or she continues to reside in this State; and the elections shall be by written ballot. But persons in the military, naval or marine service of the United States, or this State, shall not be considered as having obtained such established residence by being stationed in any garrison, barrack or military place, in any city, town or plantation; nor shall the residence of a student at any seminary of learning entitle the student to the right of suffrage in the city, town or plantation where such seminary is established. No person, however, shall be deemed to have lost residence by reason of the person's absence from the state in the military service of the United States, or of this State.

Indians. Every Indian, residing on tribal reservations and otherwise qualified, shall be an elector in all county, state and national elections.