Trump says he doesn't think he needs swing voters to win in 2020

President TrumpDonald John TrumpJulián Castro: It's time for House Democrats to 'do something' about Trump Warren: Congress is 'complicit' with Trump 'by failing to act' Sanders to join teachers, auto workers striking in Midwest MORE says that he doesn't believe he needs to appeal to swing voters in order to win reelection.

"I think my base is so strong, I’m not sure that I have to do that," Trump told Time in an interview published Thursday.

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Trump's 2020 campaign manager, Brad ParscaleBradley (Brad) James ParscaleMORE, similarly suggested to the magazine that winning over new voters isn't necessary to win reelection.

“People all think you have to change people’s minds," he said. "You have to get people to show up that believe in you."

Trump won the Electoral College to secure the presidency in 2016, but got just under 3 million fewer votes nationwide than Democratic candidate Hillary ClintonHillary Diane Rodham ClintonMissing piece to the Ukraine puzzle: State Department's overture to Rudy Giuliani On The Money: Trump downplays urgency of China trade talks | Chinese negotiators cut US trip short in new setback | Trump sanctions Iran's national bank | Survey finds Pennsylvania, Wisconsin lost the most factory jobs in past year Meghan McCain, Ana Navarro get heated over whistleblower debate MORE.

Over the course of his first term, Trump's approval rating has mostly hovered in the low- or mid-40 percent range, and he has yet to crack 50 percent approval in the Gallup poll. The poll numbers indicate Trump has struggled to win over new supporters, but has solidified support among Republicans.

The president held a rally in Orlando, Fla., on Tuesday to officially launch his reelection effort. The content of his remarks mostly played to his core supporters and was reminiscent of 2016 events where he attacked Clinton and railed against Washington insiders.