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MADISON, Wis. (AP) — Voters in Wisconsin can begin casting ballots in the presidential race on Monday, a little over two weeks before the April 5 primary in which a seat on the state Supreme Court is also at stake.

It marks the first presidential election in which Wisconsin voters will be required to show photo identification to cast their ballots, a new law that election clerks worry will cause delays and longer lines. Early voting runs through 5 p.m. on April 1, but is no longer allowed on weekends and is a week shorter than it used to be.

There is no official turnout prediction yet from the state elections board. But local clerks are preparing for long lines both because of the new photo ID requirement and the high interest in the presidential race in which Democrat Hillary Clinton and Republican Donald Trump are looking to Wisconsin to solidify their leads.

The state Supreme Court race, between Justice Rebecca Bradley and state Appeals Court Judge JoAnne Kloppenburg, is also being decided. Supporters of both candidates have been urging their backers to vote early.