PRINCETON, NJ — Republicans lead by 51% to 41% among registered voters in Gallup weekly tracking of 2010 congressional voting preferences. The 10-percentage-point lead is the GOP’s largest so far this year and is its largest in Gallup’s history of tracking the midterm generic ballot for Congress.These results are based on aggregated data from registered voters surveyed Aug. 23-29 as part of Gallup Daily tracking. This marks the fifth week in a row in which Republicans have held an advantage over Democrats — one that has ranged between 3 and 10 points.The Republican leads of 6, 7, and 10 points this month are all higher than any previous midterm Republican advantage in Gallup’s history of tracking the generic ballot, which dates to 1942. Prior to this year, the highest such gap was five points, measured in June 2002 and July 1994. Elections in both of these years resulted in significant Republican gains in House seats.
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