The Senate shall have the sole power to try impeachments. When sitting for that purpose, the Senators shall be on oath, or affirmation, and shall be presided over by the Chief Justice of the Supreme Court. Should the Chief Justice be disqualified, then the Presiding Justice shall preside. Should the Presiding Justice be disqualified, then the Senate shall select a Justice of the Supreme Court to preside. No person shall be convicted without concurrence of two-thirds of the members to which the Senate is entitled.