Sen. Bernie Sanders (I-Vt.) joined the growing field of presidential candidates on Tuesday who are hoping to replace President Donald Trump in the election less than a couple of years away.

Sanders made a name for himself as an outspoken Democratic socialist during the presidential election of 2016.

But while he ended up losing in the primaries for the Democratic Party, he’s maintained a passionate following since that time.

He announced his newest bid for the presidency in a morning video.

“Our campaign is not only about defeating Donald Trump, the most dangerous president in modern American history,” Sanders said in the video.

“It’s not only about winning the Democratic nomination and the general election. Our campaign is about transforming our country and creating a government based on the principles of economic, social, racial and environmental justice,” he also said.

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Sanders called on his supporters to build a grassroots movement to help defeat the president.

He hasn’t revealed the details of his agenda yet — but issues like economic and environmental justice were critical during his last run. He has been an active supporter of issues such as the minimum wage, universal health care, and financial sector reforms.

“Bernie Sanders is a self-avowed socialist who wants to double your taxes so the government can take over your health care,” Republican National Committee spokesman Michael Ahrens said in a statement to LifeZette on Tuesday morning. “The vast majority of voters oppose his radical agenda, just like they are going to oppose all the 2020 Democrats who have rushed to embrace it.”

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Sanders also launched a campaign website alongside the announcement about his run for the White House.

The website doesn’t include much at the moment, except for a call to action for supporters. The Vermont senator also announced his run in an email to supporters, according to CNN.

Related: Dems in 2020: Who’s Announced a Campaign, Who Might, Who’s Still Figuring It Out

Sanders in the past has advocated for rebuilding the national infrastructure, addressing the theory of climate change, bolstering the labor movement, instituting equal pay for women, offering better benefits for workers, and giving young people a free college education.

He has advocated for raising the minimum wage to $15 an hour — something many union advocates desire.

Former Secretary of State Hillary Clinton was able to defeat Sanders in the 2016 presidential election season by securing the Democratic nomination.

This time around, he is joining what is already looking to be a competitive and wide field for the party nomination. Sen. Cory Booker (D-N.J.), Sen. Kamala Harris (D-Calif.), former Housing and Urban Development Secretary Julian Castro, Rep. Tulsi Gabbard (D-Hawaii), and former Rep. John Delaney (D-Md.) all have already announced their candidacies.

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