Queens is blue in national elections, but is a swing county in state and city elections. It's probably the 2nd most conservative borough after Staten Island. Queens still has decent number of working class white people - it hasn't experienced white flight quite as bad as Brooklyn. I know there was a huge white flight from Brooklyn to Staten Island in the mid-1960's right after the Verrazano was opened.
Yeah. Interesting that the working folks in Queens and S.I. tend to vote more republican (though still blue in national county-by-county maps), while the boroughs with the richest residents (Manhattan) and the poorest (Brooklyn and Da Bronx) go solidly blue.
Queens, on the other hand, is seeing its white population grey and move to the cemetaries, while Asians, Carribbean Blacks, and Latinos move in.