New Yorkers , especially statewide , tend to be tolerant of candidates who come from someplace else , and Mr. Bloomberg , perhaps with the public 's ear already accustomed to the twang of Police Commissioner William J. Bratton , a Boston import , in the 1990 's , managed to overcome his potential handicap -LRB- as did Robert F. Kennedy , another Massachusetts transplant , when he ran for the United States Senate from New York in 1964 -RRB- .