Alexandria Ocasio-Cortez, the political newcomer who vanquished a top-ranking House Democrat in a New York primary, said Wednesday that "getting into Twitter fights" with 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 will ultimately fail to move the country forward.

In an interview on MSNBC's "Morning Joe," Ocasio-Cortez said she wants to focus her campaign on rebutting the president's policies rather than picking personal fights with him.

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"What we need to do is lay out a plan and a vision that people can believe in, and getting into Twitter fights with the president is not exactly, I think, where we're going to find progress as a nation," she said.

Ocasio-Cortez defeated Rep. Joseph Crowley (D-N.Y.), the chairman of the House Democratic Caucus, in a primary on Tuesday night. Crowley's loss marked the most significant upset for a Democratic incumbent in more than a decade.

Crowley, who was considered a possible successor to House Minority Leader Nancy Pelosi Nancy PelosiHoyer: House should vote on COVID-19 aid — with or without a bipartisan deal Ruth Bader Ginsburg lies in repose at Supreme Court McCarthy threatens motion to oust Pelosi if she moves forward with impeachment MORE (D-Calif.), had not faced a primary challenger since 2004.

But Ocasio-Cortez, a 28-year-old former organizer for 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's (I-Vt.) 2016 presidential campaign, focused her campaign on a call for generational change in Washington. Ultimately, she emerged with more than 57 percent of the vote on Tuesday.

Ocasio-Cortez has said that Democrats should not be afraid to take on the Trump administration. But she also said on Wednesday that those criticisms should be based more on policy than personal conflicts.