Opponents and supporters of a 2006 law dealing with affirmative action programs in Michigan are preparing for a court hearing.
The voter-approved measure bans the use of race and gender preferences in university admissions and government hiring and contracting.
Parts of the law have been challenged by several groups including the NAACP, the American Civil Liberties Union and By Any Means Necessary.
A hearing in the case before U.S. District Court Judge David Lawson is scheduled for Wednesday in Detroit.
The affirmative action measure is sometimes referred to as Proposal 2.