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

Former White House chief of staff Reince PriebusReinhold (Reince) Richard PriebusPoliticon announces lineup including Comey, Hannity, Priebus Sunday shows - White House stresses Trump's determination in China trade fight as GOP challenger emerges Priebus: Left's 'wacko ideas' are opportunity for Republicans in 2020 MORE warned in an interview that aired Sunday that President TrumpDonald John TrumpJimmy Carter: 'I hope there's an age limit' on presidency White House fires DHS general counsel: report Trump to cap California trip with visit to the border 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 SandersBernie SandersJimmy Carter: 'I hope there's an age limit' on presidency 2020 candidates keep fitness on track while on the trail Mark Mellman: The most important moment in history? MORE (I-Vt.), Kamala HarrisKamala Devi HarrisKavanaugh impeachment push hits Capitol buzz saw Mark Mellman: The most important moment in history? Biden leads in new national poll, Warren close behind in second place MORE (D-Calif.) and Elizabeth WarrenElizabeth Ann WarrenKavanaugh impeachment push hits Capitol buzz saw Mark Mellman: The most important moment in history? Katie Pavlich: The Democrats' desperate do-overs MORE (D-Mass.) would have trouble winning over working-class voters but that former Vice President Joe BidenJoe BidenJimmy Carter: 'I hope there's an age limit' on presidency 2020 candidates keep fitness on track while on the trail Mark Mellman: The most important moment in history? 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 MattisThe Hill's Morning Report - Trump takes 2020 roadshow to New Mexico Trump needs a national security adviser who 'speaks softly' US could deploy 150 troops to Syria: report MORE, who has since left the Trump administration as well.