Steve Bannon said Hillary Clinton will run for president in 2020.

Bannon, who was the chief executive of President Trump's campaign in the final stretch of the 2016 election, said the Democrats fear they have poor candidates this cycle and, with the House impeachment inquiry underway, are attempting to "nullify the election."

"They think they have a weak field and they're — it's like in chess — they're prepared to sacrifice a rook to take down a king. They will throw [Joe] Biden away to get to Trump and hope Elizabeth [Warren] or I even think Hillary Clinton or [Michael] Bloomberg or some centrist comes in here," Bannon said Monday on Fox Business.

Bannon, who also served as White House chief strategist, said Clinton is "doing a whole thing" this week, going on a tour with her daughter Chelsea to promote their new book Gutsy Women and calling Trump an "illegitimate president."

"She is running. She's just trying to decide how to fit her way in," Bannon said.

Clinton, 71, has said she will not attempt a third run for president, but also stressed she would be a vocal presence as Trump seeks reelection. "I’m going to keep on working and speaking and standing up for what I believe," she said in March.