A general election for members of the general assembly shall be held on the Tuesday after the first Monday of November, biennially, in the even-numbered years. The general assembly shall have power to enact laws regulating and prescribing the order and manner of voting for such members, for filling vacancies in either the house of representatives or the senate, and providing for the election of representatives or senators at some time subsequent to the Tuesday after the first Monday of November in all cases when it shall so happen that the electors in any district shall fail on that day to elect a representative or senator.