Turns out the GOP candidate sent out ~5,000 absentee ballots to olim.
From news article:
It would not be surprising if NY-9 - the district that had a special election on September 13 in which Republican Bob Turner defeated Democrat David Weprin - has the highest number of olim among its voters of any US Congressional district. Still, this is stunning: Turnerís campaign, which was staffed and assisted by many Orthodox Jews, also sent 5,000 pieces of direct mail to American citizens living in Israel who are registered to vote in the 9th CD, sources said. (Thatís more than Turnerís margin of victory of 4,128 votes in his 33,816-win upset over Democrat David Weprin.)