Former White House chief strategist Stephen Bannon said in an interview broadcast Sunday that he has "zero" doubt that President TrumpDonald John TrumpGOP senator introduces bill to hold online platforms liable for political bias Rubio responds to journalist who called it 'strange' to see him at Trump rally Rubio responds to journalist who called it 'strange' to see him at Trump rally MORE will run for reelection in 2020, but cautioned the release of the special counsel's report could shake up the political landscape.

"I happen to think now, the president is going to run again in 2020 and I think he'll win. I think he'll win bigger than he won in 2016," Bannon said on CBS's "Face the Nation," citing the strong economy.

"But ... I believe that we're going to enter into an extraordinary time in American politics," he added. "We've allowed the Democrats, because they take control of the House, to weaponize a whole bunch of investigations. They’ve been — They're going to be able to weaponize the Mueller report, 2019 is going to be quite vitriolic."

ADVERTISEMENT

Trump has given every indication he plans to run for reelection in 2020. He held his first campaign rally of 2019 in El Paso, Texas, earlier this month, and has tweeted regularly about Democratic efforts to unseat him next year.

A steadily growing field of Democratic challengers has taken shape in recent weeks. Among those who have declared their candidacy or formed exploratory committees are Sens. Kamala HarrisKamala Devi HarrisBiden, Sanders to be center stage at first debate Biden, Sanders to be center stage at first debate Poll: Six Dems lead Trump in Florida match-ups MORE (D-Calif.), Elizabeth WarrenElizabeth Ann WarrenSanders tears into Trump in response to campaign kickoff rally Sanders tears into Trump in response to campaign kickoff rally Warren introduces universal child care legislation MORE (D-Mass.), Bernie SandersBernie SandersFive takeaways from Trump's 2020 kickoff rally Five takeaways from Trump's 2020 kickoff rally Sanders tears into Trump in response to campaign kickoff rally MORE (I-Vt.), Cory BookerCory Anthony BookerWarren introduces universal child care legislation Warren introduces universal child care legislation Booker responds to Trump's mass deportation threat: 'This is not who we are' MORE (D-N.J.), Kirsten GillibrandKirsten Elizabeth GillibrandOvernight Health Care: Democrats attack after Trump revives talk of ObamaCare replacement | Cruz, Ocasio-Cortez efforts on birth control face major obstacles | CVS investing M to fight teen e-cig use Overnight Health Care: Democrats attack after Trump revives talk of ObamaCare replacement | Cruz, Ocasio-Cortez efforts on birth control face major obstacles | CVS investing M to fight teen e-cig use Trump's 2020 campaign strategy is to be above the law MORE (D-N.Y.) and Amy KlobucharAmy Jean KlobucharDemocrats detail new strategy to pressure McConnell on election security bills Democrats detail new strategy to pressure McConnell on election security bills Biden, Sanders to be center stage at first debate MORE (D-Minn.).

Former Vice President Joe BidenJoe BidenFive takeaways from Trump's 2020 kickoff rally Five takeaways from Trump's 2020 kickoff rally Sanders tears into Trump in response to campaign kickoff rally MORE and former Rep. Beto O'RourkeBeto O'RourkePoll: Six Dems lead Trump in Florida match-ups Willie Nelson on supporting O'Rourke: 'Anything he wants to do, I'm with Beto' Willie Nelson on supporting O'Rourke: 'Anything he wants to do, I'm with Beto' MORE (D-Texas) are among those expected to decide on a 2020 bid in the coming weeks.

Bannon, who served in a top role on Trump's 2016 campaign, left the White House in the summer of 2017. He and Trump later had a falling out after Bannon was quoted extensively in the book "Fire and Fury: Inside the Trump White House," including instances in which he criticized the president's family.