From Eric Dondero:

The special election for the Anthony Weiner seat is tight. The District includes parts of Brooklyn and a slither of Long Island. Democrat registration over Republican is 5 to 1.

Republican Bob Turner is within 6 points of his Democrat opponent David Weprin according to one recent poll.

But as The Hill reports:

The district, which encompasses parts of Brooklyn and Queens, is fairly Democratic but has trended a bit Republican in recent years because of a shift in support from the growing Orthodox Jewish community towards the GOP.

Republican Turner is a staunch supporter of Israel, and has the backing of former NYC Mayor and Democrat Ed Koch.

As BusinessInsider reports (photo credit):

the chances grow that the district, previously considered safely Democratic, could go Republican in the September 13th election.

New York's 9th congressional district, which includes parts of southern Brooklyn and Queens, is is home to a large population of Jewish voters, who historically go to the polls at higher rate than other segments of the population

David Weprin, the Democratic candidate to replace Weiner, is losing Jewish support fast, as his Republican opponent tries to portray him as bad for Israel. Despite being an Orthodox Jew himself, who has visited Israel several times, Weprin has been portrayed by his Republican opponent, Bob Turner, who is not Jewish, as a shill for Obama and his anti-Israel policies.