Lowest Congressional approval ratings in modern History

These findings come from a July 7-10 Gallup poll, with this most recent reading virtually unchanged from June's 16% approval. The stability in this metric -- it has not fluctuated much over the course of this year -- suggests that the 435 House members and one-third of the Senate who face re-election could do so amid the lowest congressional approval ratings for a midterm election in modern political history. Gallup historically has found that low congressional approval ratings are associated with higher congressional turnover.
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http://www.gallup.com/poll/172859/congressional-approval-rating-languishes-low-level.aspx