 The Council also required the company to complete an environmental impact assessment and more than a dozen other studies and present them to the Council before any development could proceed.Meanwhile, the loss of parking space to the children's theme park and rising Congressional opposition to the stadium deal (primarily due to the impact it would have on local residents and its high costs) imperiled the D.C. stadium deal.Congressional opposition rose significantly after the stadium's chief proponent, D.C. City Council Chairman John A. Wilson, committed suicide on May 19, 1993.