According to Polly, the mean forecast for Republican gains in the U.S. House of Representatives has gone up over the last two weeks, from 44 to 48. However, there's no change in the forecast for the Senate. Although it has bobbed up and down by one seat every few days, today the forecast is the same as it was two weeks ago. It calls for the Democrats to emerge with 51 seats, for a net gain of 8 for the Republicans. That would leave the Upper House in control of the President's party. If so, this would be the first time in nearly a century that the House, but not the Senate, undergoes a party turnover. For more from Polly on the 2010 elections, see the pages or click the button on the right of this page.