Art 15 - Sec 3

Article 15 - IMPEACHMENT Section 3 - OATH OR AFFIRMATION OF SENATORS; CONCURRENCE OF TWO-THIRDS REQUIRED When the Senate is sitting as a Court of Impeachment, the Senators shall be on oath, or affirmation impartially to try the party impeached, and no person shall be convicted without the concurrence of two-thirds of the Senators present.