The Trump campaign on Tuesday swiped at Sen. Bernie Sanders Bernie SandersButtigieg stands in as Pence for Harris's debate practice Bernie Sanders warns of 'nightmare scenario' if Trump refuses election results Harris joins women's voter mobilization event also featuring Pelosi, Gloria Steinem, Jane Fonda MORE (I-Vt.) upon the senator's 2020 presidential campaign launch, suggesting the progressive senator "has already won" the Democratic primary debate "because every candidate is embracing his brand of socialism."

"But the American people will reject an agenda of sky-high tax rates, government-run health care and coddling dictators like those in Venezuela," Trump campaign national press secretary Kayleigh McEnany said in a statement. "Only President Trump Donald John TrumpOmar fires back at Trump over rally remarks: 'This is my country' Pelosi: Trump hurrying to fill SCOTUS seat so he can repeal ObamaCare Trump mocks Biden appearance, mask use ahead of first debate MORE will keep America free, prosperous and safe."

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Sanders announced Tuesday morning he will seek the Democratic presidential nomination for the second consecutive election. He joins an increasingly crowded field of candidates that already includes Democratic Sens. Kamala Harris Kamala HarrisButtigieg stands in as Pence for Harris's debate practice First presidential debate to cover coronavirus, Supreme Court Harris joins women's voter mobilization event also featuring Pelosi, Gloria Steinem, Jane Fonda MORE (Calif.), Amy Klobuchar Amy KlobucharSocial media platforms put muscle into National Voter Registration Day Battle lines drawn on precedent in Supreme Court fight Sunday shows - Ruth Bader Ginsburg's death dominates MORE (Minn.), Elizabeth Warren Elizabeth WarrenHarris joins women's voter mobilization event also featuring Pelosi, Gloria Steinem, Jane Fonda Judd Gregg: The Kamala threat — the Californiaization of America GOP set to release controversial Biden report MORE (Mass.) and Cory Booker Cory Anthony BookerBipartisan praise pours in after Ginsburg's death DHS opens probe into allegations at Georgia ICE facility Democratic lawmakers call for an investigation into allegations of medical neglect at Georgia ICE facility MORE (N.J.), among others.

The Trump campaign announced a round of staffing hires on Tuesday morning as the operation gears up for the 2020 cycle, which could include a GOP primary challenge.

McEnany will serve as national press secretary after working as the Republican National Committee's (RNC) national spokeswoman.

The campaign announced Tim Murtaugh will take over as director of communications after serving in the same role at the Department of Agriculture.

Marc Lotter will work as the director of strategic communications, the campaign said, after working in the first year of the Trump administration as special assistant to the president and press secretary for the vice president.

The campaign tapped Cole Blocker, the deputy director of the White House Visitor's Office, as the director of finance heading into 2020.

Megan Powers will serve as director of administrative operations after working for NASA as senior adviser and press secretary, the campaign said.

"These hires are the next step toward building a national campaign infrastructure with state-of-the-art communications and fundraising tactics, innovative use of social media and a nationwide army of surrogates and small dollar donors," campaign manager Brad Parscale said in a statement. “Together, we will spread the President’s message far and wide and hold Democrat presidential candidates accountable for their extreme agenda."