He spent almost $78 million on his campaign , exceeding the record of $74 million he spent on the previous election .
Bloomberg was re-elected mayor in November 2005 by a margin of 20 percent , the widest margin ever for a Republican mayor of New York City .
mayor spent almost $78 million on mayor 's campaign , exceeding the record of $74 million he spent on the previous election .
Bloomberg was re-elected mayor in November 2005 by a margin of 20 percent , the widest margin ever for a Republican mayor of New York City .