Priebus: Trump needs Michigan, Pennsylvania and Wisconsin to win in 2020

Former White House chief of staff Reince PriebusReinhold (Reince) Richard PriebusForget the spin: Five unrefuted Mueller Report revelations Dems plot aggressive post-Mueller moves, beginning with McGahn House Judiciary chairman subpoenas former White House lawyer McGahn MORE warned in an interview that aired Sunday that President TrumpDonald John TrumpForget the spin: Five unrefuted Mueller Report revelations Lara Trump: Merkel admitting migrants 'one of the worst things that ever happened to Germany' Financial satisfaction hits record high: survey MORE needs to repeat his success in Michigan, Pennsylvania and Wisconsin in 2020 to win reelection.

Priebus told AM 970's "The Answer" that the president's path to victory in 2020 requires reigniting the support he received in working-class communities across the Rust Belt.

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"[Trump] has to win Wisconsin and Michigan," Priebus told host John Catsimatidis. "We have to win Pennsylvania."

"We’re likely to have a battle in Arizona, which is new for the Republican Party. I think we have to be very careful in Georgia," he continued.

The former White House aide and Republican National Committee chairman went on to add that current Democratic front-runners such as Sens. Bernie SandersBernard (Bernie) SandersElection analyst says Biden could face uphill battle attracting small-dollar donors Gillibrand 'not worried' about being 'discounted' in 2020 race Biden's sloppy launch may cost him MORE (I-Vt.), Kamala HarrisKamala Devi HarrisThe symbol of 'Wakanda' and black political vision Seven big decisions facing Biden in 2020 primary Sanders dominates, Buttigieg surges in 2020 social media battle MORE (D-Calif.) and Elizabeth WarrenElizabeth Ann WarrenColbert links large 2020 Dem field to Avengers: 'A group of every available person in the universe' Seven big decisions facing Biden in 2020 primary Sanders dominates, Buttigieg surges in 2020 social media battle MORE (D-Mass.) would have trouble winning over working-class voters but that former Vice President Joe BidenJoseph (Joe) Robinette BidenElection analyst says Biden could face uphill battle attracting small-dollar donors Biden's announcement was a general election message, says political analyst Gillibrand 'not worried' about being 'discounted' in 2020 race MORE would be more successful.

"I think Joe Biden would be a tough candidate in spite of these recent troubles he’s having. I think he’d be a tough candidate for the Democrats," he said.

"But other than that ... these guys are going to have a hard time in Wisconsin and Michigan and Pennsylvania. I don’t see them resonating on top of this universal health care talk and talk about socialism and free everything," he said." This just isn’t going to work for them."

Priebus, who was replaced by former chief of staff John KellyJohn Francis KellyMORE, has remained a vocal supporter of the president and his administration since leaving the political sphere.

In December, it was reported that he had received a recommendation to be commissioned into the Navy by then-Defense Secretary James MattisJames Norman MattisPentagon watchdog clears acting Defense chief in ethics probe New 2020 candidate Moulton on hypothetical Mars invasion: 'I would not build a wall' Trump learns to love acting officials MORE, who has since left the Trump administration as well.