While he acknowledged the challenges the Republicans are facing in the election, he says that they can still maintain a majority in both houses.
He added the polls do not reflect the real support for the Republican party and that things will be like in 2016.
Mr Bannon claimed Republicans were unwilling to tell people their political beliefs to pollsters and they were the “silent majority” that would mean the Republicans keep control of Congress.
He said: “Even people that had voted for Donald Trump in 2016 were unwilling to tell pollsters that they had done it.
“I think you’re seeing that again.
“I think the polls are understated for the Trump voters.”
Mr Bannon argued that while Republicans will not have a problem holding onto the Senate, they need a high turnout of Trump voters in order to keep the House of Representatives.
The former chief strategist said: “We’ll hold the Senate, pick up maybe two or three seats.
“The House, I can say, it is a complete dogfight. It can go either way.
“Right now, I think there are 25 seats that are clearly up for grabs.
“If Trump voters turn out, I actually think we’ll hold the House.”
Breitbart’s former executive chairman also shot down any idea that the Democrats were going to have an easy victory.
He said: “All this promise of this massive blue tsunami is over.
“This is going to be very hard fought. It’ll come down to a handful of districts.
“I think this is a very narrow gate that the Republicans have to go through.”
He also explained how these elections will say a lot about how much support Trump really has.
He said: “This contest for the midterm election is Trump’s first re-elect.
“This is a referendum on Trump.”
Mr Bannon has also discussed the migrant caravan and how Trump will address the issue following the election.
He said: “We have to get engaged down there.
“The problems of those people can’t be solved by the working-class people in Arizona and New Mexico and Texas.
“It has to be solved in Central America. And I think it’s going to require more engagement
“Trump is going to stop playing games with Congress after this election.
“And he’s going to force his border wall.”