The U.S. government sold its last shares of automaker General Motors Co (GM) on Monday, marking an end to a historic bailout of one of America's most storied companies. The sale leaves taxpayers short about $10 billion of the funds that the Treasury sank into the automaker in 2009. GM recorded a profit of $4.3 billion for the first nine months of this year. The bailout was hugely controversial. During the 2012 presidential campaign, Republican presidential candidate Mitt Romney called it "crony capitalism."