On February 13, 2013, Zuckerberg hosted his first ever fundraising event for New Jersey Governor Chris Christie. Zuckerberg's particular interest on this occasion was education reform, and Christie's education reform work focused on teachers unions and the expansion of charter schools. Later that year, Zuckerberg hosted a campaign fundraiser for Newark mayor Cory Booker, who was running in the 2013 New Jersey special Senate election. In September 2010, with the support of Governor Chris Christie, Booker obtained a US$100 million pledge from Zuckerberg to Newark Public Schools. In December 2012, Zuckerberg donated 18 million shares to the Silicon Valley Community Foundation, a community organization that includes education in its list of grant-making areas.