In Michigan, voters can only vote in one party column and cannot "split" their ticket (i.e., vote in more than one party column) if voting in a presidential (March) or statewide (August) primary.
Voters may “split” their ticket in the general election (November). Per the passage of Proposal 18-3 in 2018, Michigan voters also have the option to vote straight-ticket by selecting the option on the side of their ballot with partisan races. Voting straight ticket does not automatically include selections on non-partisan side of the ballot.