Former Vice President Joe Biden is the projected winner of the Michigan Democratic primary, based on an ABC News analysis of the vote so far. The Great Lake State is a big prize for the Democrats, with 125 Democratic delegates up for grabs. There are also 73 Republican pledged delegates at stake.
The polls opened at 7 a.m. and closed at 8 p.m. in the state's two time zones, EDT and CDT.
Michigan is an open primary state, which means that voters are not required to register with a party to vote in a primary, but may only choose one party's ballot.
Vermont Sen. Bernie Sanders won Michigan with 49.8% to former Secretary of State Hillary Clinton’s 48.3% in 2016.
Clinton had a sizable lead in Detroit and its surrounding areas, including Flint and Wayne County, beating Sanders with 22 points.
Sanders won Ann Arbor, where then-GOP candidate John Kasich, won on the Republican side.