Hopefully it is become more evident to people why folks like Stu Rothenberg projected a GOP wave. When races start to "break," after the RV to LV switch, they start to favor Republicans. Not every poll and every race, but there is a clear trendline that we've been seeing and it isn't good for Democrats.
Because a Gravis poll showing a lead for an incumbent Republican in Kentucky definitley means "wave".
2006 was wave bigger than Earth for the Republicans since they got 74% in the Maine Senate race.
