Ohio constitution
Article II: legislative
Section 23

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.