The richest man in New York fended off Thompson, who had tried to stoke voter resentment over the way Bloomberg changed the city's term-limits law so he could stay in office.
Thompson won big in black and Hispanic neighborhoods. This after Bloomberg spent more than $100 million on the most expensive self-financed campaign in U.S. history.
Thompson relied on donations and matching funds for his mayoral bid and probably spent about one-tenth of Bloomberg's total.
Bloomberg's margin of victory was far smaller than his nearly 20-point blowout in 2005.
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