The question of the state proposal was: "A proposed constitutional amendment to establish a commission of citizens with exclusive authority to adopt district boundaries for the Michigan Senate, Michigan House of Representatives and U.S. Congress, every 10 years."
Source for Popular Vote data: Michigan Secretary of State. 2018 Michigan Election Results, Michigan Secretary of State (https://mielections.us/election/results/2018GEN_CENR.html) (accessed 17 Nov 2018)