Alan Abramowitz's forecasting model predicts a Republican gain of a whopping 38 House seats in this year's elections.
But what's most interesting is that "the results of the forecasting model indicate that the main factors contributing to likely Republican gains in November are structural and do not reflect an especially negative political environment for Democrats. The current political environment only appears unfavorable for Democrats compared with the extraordinarily favorable environment that the Party enjoyed in both 2006 and 2008."
The bottom line is that "after gaining more than 50 seats in the past two elections, they are defending a large number of seats, many in Republican-leaning districts."