The Michigan chapter of Represent.Us, a national advocacy group, plans to lead a protest outside the Detroit offices of accounting and consulting firm Deloitte on Tuesday.

The protest is targeted at Mark Davidoff, Deloitte's managing partner for Michigan and chair of the Michigan Chamber of Commerce board of directors, over the chamber's push to keep an anti-gerrymandering proposal by Voters Not Politicians off the November ballot.

A group largely funded by the chamber called Citizens Protecting Michigan's Constitution is challenging the proposal, which would allow a voter redistricting process that does not favor any one political party. The challenge claims the proposal is unconstitutional, claiming it would require a constitutional convention.

The Michigan Court of Appeals unanimously ruled against Citizens' initial lawsuit June 7.

"Misinformation campaigns and targeted harassment are part of what is wrong with politics in America today and these tactics are not welcome here in Michigan," Michigan Chamber of Commerce CEO Richard Studley said in a written statement. "The Chamber does not support gerrymandering, as the misinformation campaign suggests; we oppose this specific ballot proposal because it's bad public policy."

"Proponents of the redistricting proposal have failed to meet the clear requirements set forth in state law and the Michigan Constitution to qualify for the ballot," Jim Holcomb, executive vice president and general counsel for the Michigan Chamber, said in the statement. "This sweeping rewrite of the State Constitution requires convening a Constitutional Convention."

Deloitte issued a statement Monday: "Deloitte has a deep, longstanding commitment to Detroit and our communities across the state. Our organization does not take positions on political matters such as this."

Represent Michigan, a local chapter of Represent.Us, ran ads in the Sunday editions of the Detroit Free Press and The Oakland Press calling for the protest. The ads featured a large photo of Davidoff and small photos of the rest of the chamber's board of directors.

Citizens Protecting Michigan's Constitution had received nearly $222,000 in funding from the Michigan chamber and connected groups through April, according to data from the Michigan Campaign Finance Network. An additional $100,000 came from West Michigan businessman John Kennedy, founder and former CEO of Kentwood-based Autocam Medical.

More than $586,000 of the total $960,000 Voters Not Politicians raised through April came from small donors, those who gave less than $10,000, according to the MCFN. Its largest donation, $150,000, came from the East Lansing-based Beckwith Constitutional Liberties Fund, the MCFN reported.

Represent Michigan said in an email that it plans to deliver 4,000 signed petitions to Davidoff's office Tuesday afternoon calling for the group to drop its legal challenge to the ballot initiative.

Voters Not Politicians gathered more than 425,000 signatures for the ballot proposal, which the Michigan Boards of Canvassers approved in June.

The ballot measure would form a 13-member commission, drawn at random by the Michigan secretary of state from a pool of approved applicants, that would oversee redistricting. The commission would consist of four Democrats, four Republicans and five commissioners with no affiliation with either major party. By design, the commission would be prohibited from offering a "disproportionate advantage" to any political party.

The process by which the commission is chosen came in for particular criticism by the chamber in its statement.

"The proposed redistricting ballot proposal would drastically rewrite Michigan's Constitution to change the basic foundation of state governing structure by removing the voice of the Governor, Legislature and Courts in the redistricting process, replacing three branches of government with a randomly drawn 13-member commission that would be unelected and unaccountable," Holcomb said in the statement.

"The ballot proposal would also place an inordinate amount of power in the hands of a partisan Secretary of State, thus favoring one political party over the other and generating divisive partisanship, public discontent and distrust of the electoral process."

Davidoff is a prominent community leader who serves on many nonprofit boards and ranked as one of Crain's Most Connected People in 2016.