A federal judge will let groups suing the Obama Foundation over its plans for a presidential center on Chicago’s South Side begin demanding information from the city of Chicago to determine how the site was selected for the project instead of other private properties.

In a hearing late Tuesday, District Court Judge John Robert Blakey agreed to let the plaintiffs, led by Protect Our Parks, obtain information from the city of Chicago and Obama officials on how it selected the site. The Barack Obama Presidential Center is being proposed on federal land that was deemed by the government in 2012 to be inappropriate for construction.