daily convenience (the rationale he claimed) and its ability to convey a signature style." [126] He was a pescetarian.[127]Jobs's car was a silver 2008 Mercedes-Benz SL 55 AMG, which does not display its license plates, as he took advantage of a California law which gives a maximum of six months for new vehicles to receive plates; Jobs leased a new identical SL every six months.[128][129] Political activitiesThis section requires expansion.In a 2011 interview with biographer Walter Isaacson, Jobs revealed at one point he met with U.S. President Barack Obama, complained of the nation's shortage of software engineers, and told Mr. Obama that he was "headed for a one-term presidency." Jobs proposed that any foreign student who got an engineering degree at a U.S. university should automatically be offered a green card. After the meeting, Jobs commented, "The president is very smart, but he kept explaining to us reasons why things can't get done.... It infuriates me." [130]Jobs contributed to a number of political candidates and causes during his life, giving $209,000 to Democrats, $19,000 to associated special interests and $1,000 to a Republican.[131] Health issuesJobs diverted questions of his health with a slide showing normal blood pressure in 2008.In October 2003, Jobs was diagnosed with cancer,[132] and in mid-2004, he announced to his employees that he had a cancerous tumor in his pancreas.[133] The prognosis for pancreatic cancer is usually very poor;[134] Jobs stated that he had a rare, far less aggressive type known as islet cell neuroendocrine tumor.[133] Despite his diagnosis, Jobs resisted his doctors' recommendations for mainstream medical intervention for nine months,[99] instead consuming a special alternative medicine diet in an attempt to thwart the disease. According to Harvard researcher Dr. Ramzi Amir, his choice of alternative treatment "led to an unnecessarily early death".[132] According to Jobs's biographer, Walter Isaacson, "for nine months he refused to undergo surgery for his pancreatic cancer a decision he later regretted as his health declined."[135] "Instead, he tried a vegan diet, acupuncture, herbal remedies and other treatments he found online, and even consulted a psychic. He also was influenced by a doctor who ran a clinic that advised juice fasts, bowel cleansings and other unproven approaches, before finally having surgery in July 2004."[136] He eventually underwent a pancreaticoduodenectomy (or "Whipple procedure") in July 2004, that appeared to successfully remove the tumor.[137][138][139] Jobs apparently did not receive chemotherapy or radiation therapy.[133][140] During Jobs's absence, Tim Cook, head of worldwide sales and operations at Apple, ran the company.[133]In early August 2006, Jobs delivered the keynote for Apple's annual Worldwide Developers Conference. His "thin, almost gaunt" appearance and unusually "listless" delivery,[141][142] together with his choice to delegate significant portions of his keynote to other presenters, inspired a flurry of media and Internet speculation about his health.[143] In contrast, according to an Ars Technica journal report, Worldwide Developers Conference (WWDC) attendees who saw Jobs in person said he "looked fine".[144] Following the keynote, an Apple spokesperson said that "Steve's health is robust."[145]Two years later, similar concerns followed Jobs's 2008 WWDC keynote address.[146] Apple officials stated Jobs was victim