Former White House chief strategist Steve Bannon believed he would be the perfect person to succeed President Trump in the case the GOP leader resigned or was impeached, according to a newly released book on the former government official.

"If Trump quit or was impeached, Bannon told friends, it would eliminate the first great champion of Trumpism — but it wouldn't be a negative judgment on the politics that had swept him into office. In such a scenario, who better to succeed Trump than the man who got him elected?" Joshua Green wrote in "Devil's Bargain," set to be released Tuesday.

Bannon also considered creating a new political party for economic nationalists like himself and those who supported Trump in the 2016 election.

Launching a new party would give him an official base of supporters, rather than putting him up against moderates of the Republican Party.

"But Bannon had thought hard enough about a path to the White House that he'd even toyed with starting a new political party and settled on a name: the National Union Party. That was the temporary name that Abraham Lincoln and the Republican Party had adopted in 1864 to attract War Democrats and Unionists.

"In Bannon's vision, it would now unite disaffected populists on both ends of the political spectrum. With support from financial benefactors like the Mercer family, he seemed to imagine such a path might be viable, and that a true devotee of right-wing nationalism — rather than a charlatan like Trump — could succeed where his predecessor had failed," Green wrote, according to an excerpt.