The governor shall be commander-in-chief of the military forces of the state, except when they are called into the service of the United States, and may call out the same to execute the laws, suppress insurrection and repel invasion. He shall have power to convene the legislature on extraordinary occasions. He shall at the commencement of each session communicate to the legislature by message, information of the condition of the state, and recommend such measures as he shall deem expedient. He shall transact all necessary business with the officers of the government, civil and military. He shall expedite all such measures as may be resolved upon by the legislature and shall take care that the laws be faithfully executed.