The house of representatives shall have the sole power of impeachment. A resolution of impeachment shall not be considered unless it is signed by one-quarter (1⁄4) of the members. For the purposes of impeachment, the general assembly and the committees thereof shall have the power to compel the attendance of witnesses and production of documents. A vote of two-thirds (2⁄3) of the members shall be required for an impeachment of the governor. Any officer impeached shall thereby be suspended from the office until judgment in the case shall have been pronounced.