Washington (CNN) - On the eve of the midterm elections, one of the top non-partisan political handicappers is upping its prediction of how many seats the Republicans will win back in the House of Representatives.
The Cook Political Report Monday forecast a net gain of 50 to 60 seats for the Republicans in the House, with higher gains possible. The Cook Report was previously forecasting a net gain of 45 to 55 seats for the GOP.
"The midterm maelstrom pulling House Democrats under shows no signs of abating," says the Cook Political Report.
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.
Another top non-partisan political handicapper, the Rothenberg Political Report, is forecasting a net gain of 55 to 65 seats for the Republicans, with gains at or above 70 seats 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.
In the battle for control of the Senate, Cook is predicting a net gain of six to eight seats for the GOP, down from seven to nine seats. Rothenberg is also forecasting a net gain of six to eight seats for the Republicans. The GOP needs a net gain of 10 seats to reclaim control of the Senate, which it lost four years ago.
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