The governor, lieutenant-governor, attorney-general, state auditor, secretary of state, state treasurer, superintendent of education, commissioner of agriculture and industries, and justices of the supreme court may be removed from office for willful neglect of duty, corruption in office, incompetency, or intemperance in the use of intoxicating liquors or narcotics to such an extent, in view of the dignity of the office and importance of its duties, as unfits the officer for the discharge of such duties, or for any offense involving moral turpitude while in office, or committed under color thereof, or connected therewith, by the senate sitting as a court of impeachment, under oath or affirmation, on articles or charges preferred by the house of representatives. When the governor or lieutenant-governor is impeached, the chief justice, or if he be absent or disqualified, then one of the associate justices of the supreme court, to be selected by it, shall preside over the senate when sitting as a court of impeachment. If at any time when the legislature is not in session, a majority of all the members elected to the house of representatives shall certify in writing to the secretary of state their desire to meet to consider the impeachment of the governor, lieutenant-governor, or other officer administering the office of governor, it shall be the duty of the secretary of state immediately to notify the speaker of the house, who shall, within ten days after receipt of such notice, summon the members of the house, by publication in some newspaper published at the capitol, to assemble at the capitol on a day to be fixed by the speaker, not later than fifteen days after the receipt of the notice to him from the secretary of state, to consider the impeachment of the governor, lieutenant-governor, or other officer administering the office of governor. If the house of representatives prefer articles of impeachment, the speaker of the house shall forthwith notify the lieutenant-governor, unless he be the officer impeached, in which event he shall notify the secretary of state, who shall summon, in the manner herein above provided for, the members of the senate to assemble at the capitol on a day to be named in said summons, not later than ten days after receipt of the notice from the speaker of the house, for the purpose of organizing as a court of impeachment. The senate, when thus organized, shall hear and try such articles of impeachment against the governor, lieutenant-governor, or other officer administering the office of governor, as may be preferred by the house of representatives.