SECTION 1 IMPEACHMENT - POWER OF AND PROCEDURE. The house of representatives shall have the sole power of impeachment. The concurrence of a majority of all the members shall be necessary to an impeachment. All impeachments shall be tried by the senate, and, when sitting for that purpose, the senators shall be upon oath or affirmation to do justice according to law and evidence. When the governor or lieutenant governor is on trial, the chief justice of the supreme court shall preside. No person shall be convicted without a concurrence of two-thirds of the senators elected.