Senate Judiciary Committee was investigating the pardon and issued subpoenas for Denise Rich's bank records because she refused to testify before the House Government Reform Committee, in accordance with her Fifth Amendment right against self-incrimination. U.S. Attorney Mary Jo White also launched a criminal investigation into whether the pardon had been a result of the contributions. It was later claimed that Rich had donated the funds months before asking for a pardon. Clinton maintained that the pardon had not been bought, but had been based instead on the legal merits of Marc Rich's appeal. During the 2008 U.S. presidential election, Barack Obama referenced the donations during his primary campaign against Hillary Rodham Clinton. Clinton has also been criticized for the library's lack of coverage regarding various scandals during his presidency, including the Whitewater scandal. Clinton adviser Bruce Lindsey said that Clinton wanted to provide information regarding the incidents, but depicting the attacks as a scheme to "delegitimize" Clinton's administration. The museum's main exhibit designer has said that "this is the way the president wanted to see his legacy defined." Design General design The primarily modernist complex was designed by James Polshek's Polshek Partnership Architects, led by Polshek and partner Richard Olcott. The structural engineer for this project was Leslie E. Robertson Associates. The museum and exhibitions were designed by Ralph Appelbaum Associates, with landscaping by Hargreaves associates. Clinton did not announce his choice of architect until 1999, when Polshek was officially hired that August. Although Appelbaum was the official designer for the exhibitions, Appelbaum called Clinton "the editor-in-chief, the curator-in-chief and in many times the art director of the exhibits". It is constructed primarily of steel and glass. The main building is based on the diagonal truss. Originally, the museum was planned parallel to the river, but was quickly changed so it would lie perpendicular to the river, for the purpose of providing a better view to visitors. The western façade of the museum is a screen wall composed of laminated glass tiles, providing a sunscreen for the building. The underside is constructed of aluminum. Some critics dislike the bridge design, saying it looks too much like a trailer on stilts. Environment The library incorporates many aspects of environmentally-sensitive design, in accordance to Clinton's work involving sustainable development. It first earned a Silver Leadership in Energy and Environmental Design (LEED) certification under the United States Green Building Council LEED for