Arkansas constitution
Article 15: impeachment and address
Section 2

The House of Representatives shall have the sole power of impeachment. All impeachments shall be tried by the Senate. When sitting for that purpose, the Senators shall be upon oath or affirmation; no person shall be convicted without the concurrence of two-thirds of the members thereof. The Chief Justice shall preside, unless he is impeached or otherwise disqualified, when the Senate shall select a presiding officer.