LANSING, Mich. (Great Lakes News) – The Michigan Democratic Party is challenging the petition signatures of three top Republican candidates for governor.

Attorneys working on behalf of the Democrats are challenging the signature petitions of ex-Detroit Police Chief James Craig, former newscaster Tudor Dixon, and businessman Perry Johnson.

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The move comes as a similar challenge happens within the Republican party.

A group tied to Dixon has challenged nominating petitions submitted by Craig.

They said he likely did not turn in enough valid signatures to qualify for the GOP primary.

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The deadline to contest signatures is Tuesday.

Michigan voters will narrow down the field in the August 2 primary. The GOP winner will take on Gov. Gretchen Whitmer in November.