Given the following context:

According to Trump, he received approval for a 3,600-square-foot (334.5 m2) sign from Chicago Mayor Richard M. Daley's administration in 2009, but renegotiated with Mayor Rahm Emanuel's administration. In October 2013, Trump received approval to erect 20-foot (6.1 m) tall stainless steel letters back-lit with white LED lighting spelling out TRUMP on the 16th floor of the building. He made his impending plans for the sign public in February 2014. According to a city planning department spokesperson, standard protocol for such a sign is to require approval from the local alderman (Brendan Reilly, 42nd ward) and the full Chicago City Council. The five letters span a width of approximately 141 feet (43 m), making the final approved version approximately 2,800 square feet (260.1 m2)—2,891 square feet (268.6 m2) according to some sources—rather than the originally proposed size. The sign is located about 200 feet (61 m) above ground level.Crews began hanging the sign in May 2014. When Chicago Tribune architecture critic Kamin warned Trump that his review of the sign would be unfavorable, Trump responded "As time passes, it'll be like the Hollywood Sign"; architect Smith distanced himself from the sign saying "Just for the record, I had nothing to do with this sign!" The controversy surrounding the sign drew attention in the national press and international press as it neared completion and the Associated Press ran a story about Mayor Emanuel's disapproval in mid-June. According to the Mayor's spokeswoman Kelley Quinn, "Mayor Emanuel believes this is an architecturally tasteful building scarred by an architecturally tasteless sign". Kamin has noted that part of the problem is the architectural traditions of the city: "If this sign was in Atlantic City or Las Vegas, nobody would care—but it is in Chicago, and in a part of Chicago full of great buildings from the 1920s to the 1960s and onward". Trump and Reilly both pointed out how unbecoming the prior Chicago Sun-Times building signage was. As a result of the fiasco,...

answer the following question:

What is the name of the person that had to renegotiate with Mayor Rahm Emanuel's administration? 

Trump