[2] Democrats won a majority of 56 out of 110 seats, winning control of the chamber for the first time since 2008.

Following the approval of a voter-initiated constitutional amendment in 2018, the responsibility for legislative and congressional reapportionment was transferred from the state legislature to a 13-member citizens commission.

[5] Many blamed the maps drawn by Republicans after the 2010 census for enabling the party to maintain control of the legislature throughout the decade despite losing the statewide popular vote multiple times.

[3] Simultaneously with Democrats gains in the state senate, winning control of that chamber the first time since 1984, and Governor Gretchen Whitmer winning re-election, Democrats won a trifecta in the state for the first time in 40 years.

[8] Democrats benefited from a more favorable map than they had in the previous decade, as well as the down-ballot effects of Whitmer's victory and the passage of a referendum on abortion rights.