Republican infighting over the fate of immigrants brought illegally to the United States as children could be so vitriolic that the party loses control of the U.S. House of Representatives next year, Steve Bannon, a former adviser to President Donald Trump, said in an interview airing on Sunday.

Bannon, whose far-right views on immigration, climate and trade helped shape Trump's presidential campaign and his first months in office, was fired by the Republican president last month in a push to end factional fights within the White House.

In an interview with the CBS program "60 Minutes," Bannon predicted Republicans could lose control in the House in the 2018 congressional elections because of a looming battle over what to do about 800,000 immigrants known as Dreamers.