EXPLAINER: Why disputed maps won't stop Ohio's May 3 primary

COLUMBUS, Ohio (AP) — Despite the uncertainty raised over the date of Ohio’s primary election, the state is ready to move forward with early voting Tuesday for a likely May 3 contest with statewide and congressional races, but not legislative ones.

The partial primary is scheduled to go ahead despite months of unresolved legal wrangling that has seen proposed redistricting maps repeatedly shot down by the Ohio Supreme Court as unconstitutional gerrymanders. U.S. House races have been allowed to continue because court proceedings have tied up the latest disputed map beyond Election Day.

State legislative races are being delayed because no set of district boundaries has been settled on long enough to be used for making ballots.

Ohioans must register to vote by Monday, unless the judiciary or Legislature intervenes, even as legal challenges continue to pour into state and federal courts.

Some things to know about the situation:

WHICH RACES WILL APPEAR ON THE MAY 3 BALLOT?

Voters will decide partisan primaries for U.S. Senate, U.S. House, governor, secretary of state and various local races and ballot questions. The seven-way Republican primary for retiring GOP Sen. Rob Portman's seat is among the nastiest and most expensive in the nation this year, with an endorsement from former President Donald Trump still a long shot possibility. Three Democrats are also running for the seat, which the party sees as among their best chances nationally to flip. Republican Gov. Mike DeWine is facing three GOP challengers from the right, while two former mayors — Nan Whaley of Dayton and John Cranley of Cincinnati — are vying for the Democratic gubernatorial nomination.

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WHAT ABOUT LEGISLATIVE RACES?

Candidates for Ohio House and Ohio Senate will not appear on May 3 ballots. A group...