Bottom-line, there is no evidence that anything historic or beyond the norm is currently in the works. If the election were tomorrow, Democrats would likely lose about 20 seats in the current 55-seat battleground, offset by some further Republican losses – resulting in a net loss near 15 to 20 seats. That is slightly below the historic norm and less than half of the number needed to threaten taking control. Moreover, the vote and incumbent job approval in the 37 Democratic districts we also polled in July is stable – without sign of a broad deterioration. This should give some perspective.<2>
To be sure, there are serious trends that put some Democrats at risk, particularly an anti-incumbent mood that is apparent in all three Democratic tiers, as well as the Republican seats. The Democrats’ image has weakened since July, along with President Obama’s approval in these Republican-leaning seats, in line with national trends from the late summer. The voters here are split evenly on whether they want to reward their incumbent with reelection or vote for a Republican to control spending.
Yet, the Democratic vote is stable because the Republican brand remains deeply, and increasingly, unpopular. This is part of the reason Republicans are unlikely to see the kind of gains some are expecting. The standing of the Republican Party has declined since April (if not quite as dramatically) when they held a net favorability rating of -7 points (33 to 40 percent) compared to the -14 point today (31 to 45 percent). Both parties are now viewed nearly identically (43.7 degrees for the Republican Party and 43.4 degrees for the Democratic Party)<5> – leaving each party with a comparable wind in its face. There is no wave.
http://www.democracycorps.com/strategy/2009/10/2010-congressional-battleground-stable-and-within-normal-historical-range/?section=AnalysisMy own feeling is that it's too early to say how '10 will come out--a vote a year from now is a life time in politics and the 2010 election will come down to:
1) How is the economy doing in November 2010--is unemployment starting to go down?
2) Did Obama and Dems in Congress pass a good health care plan?
3) Where is President Obama's approval rating in November 2010?
4) Which party will generate enough enthusiasm among its base to actually turn out in higher numbers in a low turnout midterm election?