In a major victory for Gov. Eliot Spitzer and his party, a Democratic assemblyman won a stunning upset in a State Senate election on Tuesday in a district that has been in Republican hands for a century.
The win reduces the Republicans' majority to one seat and will intensify pressure on the majority leader, Joseph L. Bruno, as he tries to maintain his party's grip on the Senate, which it has controlled for more than 40 years.
The Democrat, Darrel J. Aubertine, a dairy farmer, leaned heavily on Mr. Spitzer's media consultant and the state Democrats' money as he waged a costly campaign against the Republican, William A. Barclay, a lawyer and an assemblyman whose father once held the Senate seat.
Mr. Aubertine won 52 percent of the vote to 48 percent for Mr. Barclay, according to unofficial results. Republicans outnumber Democrats 78,454 to 46,824 in the north country district, and Mr. Barclay had been favored to win....
Both party operations poured money and campaign workers into the race, and ads flickered on television screens in Jefferson, Oswego and St. Lawrence Counties, which make up the district. The Capitol in Albany emptied out on Tuesday as staffers hit the streets to wave signs, knock on doors and staff polling places.
The Democrats also relied on the Working Families Party, a union-backed group with a strong voter-mobilization operation, to get out the vote for Mr. Aubertine.
The special election was called after Senator James W. Wright, a Republican, announced his retirement.
The possibility of taking back the Senate has taken on a special urgency to Mr. Spitzer as he struggles with low approval ratings and the aftermath of a scandal last year involving his aides' attempt to discredit Mr. Bruno.
The district is heavily Republican, and this is one step closer to taking the Senate in New York state and making it an innovator in progressive governance. It's a clear lucky break for Spitzer, who needs one, and another reason for the institutional machinery backing Republicans in New York state (1199, for instance) to back liberal Democrats instead.