Future president Ronald Reagan gave a political speech at the school's Memorial Union in 1957, and returned to campus as a former president on March 20, 1989, delivering his first ever post-presidential speech at ASU's Wells Fargo Arena. President George H. W. Bush gave a lecture at Wells Fargo Arena on May 5, 1998. President Bill Clinton became the first sitting president to visit ASU on October 31, 1996, speaking on the Grady Gammage Memorial Auditorium lawn. He returned to ASU in 2006, and in 2014, President Clinton, Hillary Clinton, and Chelsea Clinton came to campus to host the Clinton Global Initiative University. President George W. Bush became the second sitting president to visit the school's campus when he debated Senator John Kerry at the university's Grady Gammage Memorial Auditorium on October 13, 2004. President Barack Obama visited ASU as sitting president on May 13, 2009. President Obama delivered the commencement speech for the Spring 2009 Commencement Ceremony. President Obama had previously visited the school as a United States senator. President Richard Nixon did not visit ASU as president, but visited Phoenix as president on October 31, 1970, at an event that included a performance by the Arizona State University Band, which President Nixon acknowledged. As part of President Nixon's remarks, he stated that, "when I am in Arizona, Arizona State is number one." Controversies Sexual assault investigation On May 1, 2014, ASU was listed as one of fifty-five higher education institutions under investigation by the Office of Civil Rights "for possible violations of federal law over the handling of sexual violence and harassment complaints" by Barack Obama's White House Task Force To Protect Students from Sexual Assault. The publicly announced investigation followed two Title IX suits. In July 2014, a group of at least nine current and former students who alleged they were harassed or assaulted asked the federal investigation be expanded. In August 2014 ASU president Michael Crow appointed a task force comprising faculty and staff, students, and members of the university police force to review the university's efforts to address sexual violence. Crow accepted the recommendations of the task force in November 2014. Faculty plagiarism In 2011, Professor Matthew C. Whitaker was accused of plagiarizing material in six books he had written, as well as in a speech he made to local high school students. After watching a video of the speech, a plagiarism analyst said he