Former White House chief strategist Stephen Bannon said in an interview broadcast Sunday that he has "zero" doubt that President TrumpDonald John TrumpTrump suggests Sotomayor, Ginsburg should have to recuse themselves on 'Trump related' cases Sanders says idea he can't work with Republicans is 'total nonsense' Sanders releases list of how to pay for his proposals 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."

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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 HarrisThis week: House to vote on legislation to make lynching a federal hate crime Juan Williams: Black votes matter Clyburn: Biden 'suffered' from not doing 'enough' in early debates MORE (D-Calif.), Elizabeth WarrenElizabeth Ann WarrenCandidates face pressure to exit presidential race Buttigieg proposes undoing SALT deduction cap Bloomberg called Warren 'scary,' knocked Obama's first term in leaked audio MORE (D-Mass.), Bernie SandersBernie SandersSanders says idea he can't work with Republicans is 'total nonsense' Sanders defends Castro comments in wake of backlash from some Democrats Sanders releases list of how to pay for his proposals MORE (I-Vt.), Cory BookerCory Anthony BookerDemocrats' Obama-to-Sanders shift on charter schooling This week: House to vote on legislation to make lynching a federal hate crime Juan Williams: Black votes matter MORE (D-N.J.), Kirsten GillibrandKirsten GillibrandNow is the time for a US data protection agency The Hill's Campaign Report: Warren up, Bloomberg down after brutal debate Ginsburg, accepting lifetime achievement award, urges working fathers to take an active role in kids' lives MORE (D-N.Y.) and Amy KlobucharAmy Jean KlobucharKlobuchar releases medical report that says she's in 'very good health' Candidates face pressure to exit presidential race Buttigieg proposes undoing SALT deduction cap MORE (D-Minn.).

Former Vice President Joe BidenJoe BidenSanders defends Castro comments in wake of backlash from some Democrats Klobuchar releases medical report that says she's in 'very good health' Candidates face pressure to exit presidential race MORE and former Rep. Beto O'RourkeBeto O'RourkeCNN signs Andrew Yang as contributor Krystal Ball: Voters are coming to their own judgements about who is electable Warren campaign to host series of events in Texas 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.