Article II, Section 23 | Impeachments; how instituted and conducted

The house of Representatives shall have the sole power of impeachment, but a majority of the members elected must concur therein. Impeachments shall be tried by the senate; and the senators, when sitting for that purpose, shall be upon oath or affirmation to do justice according to law and evidence. No person shall be convicted without the concurrence of two-thirds of the senators.