Hillary Clinton and Donald Trump took big leads over their competitors in a new survey of Michigan voters released Monday, a day before the polls open in the major Midwestern industrial state.

Michigan is one of four states to hold primary contests on Tuesday, and has the most delegates at stake: 59 are up for grabs for Republicans and 147 for Democrats. Delegates are awarded proportionally, and based on the results of a Monmouth University poll, the former secretary of state and the New York real estate mogul appear poised to walk away with the greatest numbers.