Wave builds for GOP in the House

Stuart Rothenberg September 6, 2010 · 10:30 PM EDT

National and local polls continue to show further deterioration in Democratic prospects. Given that, we are increasing our target of likely Republican gains from 28-33 seats to 37-42 seats, with the caveat that substantially larger GOP gains in the 45-55 seat range are quite possible. The next few weeks will be crucial, as Democratic incumbents seek to drive up Republican challengers’ negatives and strengthen their standing in ballot tests.