Washington (CNN) - With four days to go until the midterm elections, one of the top non-partisan political handicappers is upping the prediction of how many seats the Republicans will win back in the House of Representatives.
The Rothenberg Political Report Friday forecast a net gain of 55 to 65 seats for the Republicans, with gains at or above 70 seats possible. That's up from Rothenberg's previous forecast of a GOP gain of 45 to 55 seats. The Republicans need a net gain of 39 seats to win back control of the chamber from the Democrats, who have held the House and the Senate for the last four years.
"At this point, there are no signs of a Democratic 'surge,' and some Democrats think that the political environment is deteriorating for the party. Across the country, Republicans are ending their campaigns with calls to 'check' President Obama. Given the mood of the electorate, this is likely to be an effective closing argument," says the Rothenberg Report.
Another top non-partisan political handicapper, the Cook Political Report, Wednesday forecast a net gain of 48 to 60 seats for the Republicans, with higher gains possible.
The largest midterm House loss for the president's party over the past half century came in 1994, when the GOP won back 52 seats to retake the House, and the Senate as well.
Twelve years later the Democrats won back control of the chamber with a net gain of 30 seats, as well as taking back the Senate.
–Follow Paul Steinhauser on Twitter: @psteinhausercnn