Former House Speaker Newt Gingrich (R-Ga.) said Monday he's fairly confident that Republicans will take back the House of Representatives this fall.

"I think the odds are very high [that Democrats are] going to lose the House," Gingrich said in an interview Monday on "Good Morning America." He also predicted the party would lose "an amazing number of governorships" in 2010.

He said winning a majority in the Senate is also possible for Republicans this fall.

Gingrich hit House Speaker Nancy Pelosi (D-Calif.) and Senate Majority Leader Harry Reid (D-Nev.) on everything from the deficit to the stimulus, suggesting the only path for Democrats in 2010 is to "attack the Republicans relentlessly."

"Pelosi and Reid have been in charge of the Congress since January of '07, so they're defending a four-year record in which the economy collapsed, all of it under their watch. The deficits have gone up under their watch," Gingrich said.

Gingrich is a potential GOP presidential contender in 2012. The former Speaker has stepped up his political activity in recent months, campaigning for Republican candidates in battleground states and making trips to Iowa and South Carolina.

"The level of radicalism that President Obama represents offers a very different range of choices for the American people in 2012," Gingrich said Monday.

Gingrich has said he will decide whether to pursue a presidential run by next March.