President Trump Donald John TrumpBiden on Trump's refusal to commit to peaceful transfer of power: 'What country are we in?' Romney: 'Unthinkable and unacceptable' to not commit to peaceful transition of power Two Louisville police officers shot amid Breonna Taylor grand jury protests MORE’s 2020 campaign manager on Sunday outlined several states won by Hillary Clinton Hillary Diane Rodham ClintonDemocratic groups using Bloomberg money to launch M in Spanish language ads in Florida The Hill's Campaign Report: Presidential polls tighten weeks out from Election Day More than 50 Latino faith leaders endorse Biden MORE that the Trump campaign believes will be "in play" in 2020.

In addition to the campaign’s work in states that were key to Trump’s 2016 victory — including Pennsylvania, Michigan and Wisconsin — the campaign is setting its sights on Minnesota, New Mexico and New Hampshire, campaign manager Brad Parscale Bradley (Brad) James ParscaleMORE told CBS's "Face The Nation."

"I think Nevada, you know, even Colorado" are winnable for the campaign, Parscale added. "And so those are states we did not win in 2016 that I think are open for 2020."

Trump campaign manager Brad Parscale says the campaign believes New Mexico, New Hampshire, Nevada and Colorado could be flipped to Trump in 2020 https://t.co/H9n7JKbYS7 pic.twitter.com/uc4T7Pc6j0 — CBS News (@CBSNews) April 28, 2019

Parscale also told CBS the campaign was developing "one of the largest ground games in history" and plans to deploy 1.6 million volunteers, compared to about 700,000 in 2016.

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"In every single metric we're looking at being bigger, better and badder than we were in 2016 … but this time we're not out there trying to prove we can do something. The president's proved he has done it, and now we just have to deliver what he's done," Parscale added.

Parscale’s comments come as Democratic contenders for the 2020 nomination seek to claw back votes in historically Democratic states that largely went for Democrats in the 2018 midterms but failed to push Clinton over the finish line two years earlier.

Sen. Bernie Sanders Bernie SandersOutrage erupts over Breonna Taylor grand jury ruling Dimon: Wealth tax 'almost impossible to do' Grand jury charges no officers in Breonna Taylor death MORE (I-Vt.), who has placed second in most polls of the crowded Democratic field, has accused Trump of betraying the working class in the Rust Belt, while the Democratic National Committee has mounted an effort to highlight what it says are promises Trump broke to local communities.