The seat has a substantial black population, particularly in the wards near Brixton, as well as significant numbers of Asian voters.
Both candidates are focusing on Hispanic and Asian voters in a county long seen as a bastion of conservative whites.
Asian voters make up 18% of the electorate.
The election will be the first in which white, mixed-race and Asian voters cast ballots on the same day for three segregated chambers of Parliament.
He said strong participation among black, Hispanic, Asian and liberal white voters will enable him to win re-election.
- Conducts the first exit poll of Asian American voters in the 1988 Presidential election.
Asian American voters often are overlooked by the mainstream media and by candidates for political office.
Asian voters are even more likely than Hispanic voters to lean Republican, he said.
In the end, Mr. Brown said, his appeal to more conservative Asian voters and homeowners won the day.
And of those eligible black, Hispanic and Asian voters, a smaller proportion actually vote than do whites.