Delaware constitution
Article III
Section 13

The Governor may for any reasonable cause remove any officer, except the Lieutenant-Governor and members of the General Assembly, upon the address of two-thirds of all the members elected to each House of the General Assembly. Whenever the General Assembly shall so address the Governor, the cause of removal shall be entered on the journals of each House. The person against whom the General Assembly may be about to proceed shall receive notice thereof, accompanied with the cause alleged for his or her removal, at least ten days before the day on which either House of the General Assembly shall act thereon.