New York City Mayor Bill de Blasio (D) said in an interview on Sunday that President Trump Donald John TrumpHR McMaster says president's policy to withdraw troops from Afghanistan is 'unwise' Cast of 'Parks and Rec' reunite for virtual town hall to address Wisconsin voters Biden says Trump should step down over coronavirus response MORE should not be able to beat Democratic candidates on economic messaging, despite his success during the 2016 campaign.

"Trump got a lot of that message out and attracted a lot of people. That should not be a message that someone like Trump can beat Democrats on," de Blasio told radio host John Catsimatidis on AM 970 in New York.

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"I think the message should be a progressive one and about an economic vision for fairness. I think that’s something [Sen.] Bernie Sanders Bernie SandersMcConnell accuses Democrats of sowing division by 'downplaying progress' on election security The Hill's Campaign Report: Arizona shifts towards Biden | Biden prepares for drive-in town hall | New Biden ad targets Latino voters Why Democrats must confront extreme left wing incitement to violence MORE [I-Vt.] did a great job with in 2016," he said.

De Blasio's comments come as Democrats gear up to attempt to take the House and Senate from Republicans in the upcoming 2018 midterm elections.

The Trump administration has touted economic improvement under the president, along with the recently passed GOP-backed tax plan.

However, Democrats have pounded on the plan's unpopularity in polls, and have planned to campaign on it in 2018.

De Blasio, who won his reelection bid in November, is seen as a potential 2020 presidential contender.

The mayor sparked speculation of a run when he visited Iowa in December.

"This is what I'm here to do and the future will take care of itself," he said on Sunday, referring to his mayoral post, adding that he wants to work to strengthen the Democratic Party around the country.