Robert Rubin (l), Alan Greenspan (c), and Larry Summers (r) have deep and long ties to Citibank and to the highest levels of government. Rubin was chairman of Citigroup and a former Treasury secretary who pushed through many of the deregulatory schemes that made the 2008 to present Great Recession possible. Greenspan, the long-standing chairman of the Federal Reserve, created the money supply which fueled the housing bubble, this in response to the collapse of the tech bubble. Summers, also a former Treasury Secretary, pushed for the repeal of Glass Steagall, and other deregulatory measures including a hands-off policy toward the collateralized debt obligations (CDOs), which were at the heart of the 2008 financial meltdown. Summers has a long and checkered association with Citi, incluing accepting a free ride home on the Citi corporate jet from the Democratic Convention in 2008 and $99,000 for giving two speeches to Citi executives in 2008, shortly before he assumed regulatory oversight of Citi as an official in the Obama administration.