Unfortunately, this comes as no surprise to the readers of this blog: Democrats’ Long-Held Seats Face G.O.P. Threat

From The New York Times:

Representative David R. Obey has won 21 straight races, easily prevailing through wars and economic crises that have spanned presidencies from Nixon’s to Obama’s. Yet the discontent with Washington surging through politics is now threatening not only his seat but also Democratic control of Congress.

Mr. Obey is one of nearly a dozen well-established House Democrats who are bracing for something they rarely face: serious competition. Their predicament is the latest sign of distress for their party and underlines why Republicans are confident of making big gains in November and perhaps even winning back the House.

The fight for the midterm elections is not confined to traditional battlegrounds, where Republicans and Democrats often swap seats every few cycles. In the Senate, Democrats are struggling to hold on to, among others, seats once held by President Obama and Vice President Joseph R. Biden Jr. Democrats are preparing to lose as many as 30 House seats — including a wave of first-term members — and Republicans have expanded their sights to places where political challenges seldom develop.

[T]hat Mr. Obey here in Wisconsin and other veteran lawmakers . . . suddenly find themselves in a fight reflects an increasingly sour mood toward the Democratic Party and incumbents.