Vermont Sen. Bernie Sanders on Tuesday launched a second bid for the White House — slamming President Trump as a “racist” and a “pathological liar” as he added his name to a growing list of candidates vying for the Democratic nomination.

“Together, you and I and our 2016 campaign began the political revolution. Now, it is time to complete that revolution and implement the vision that we fought for,” the self-described socialist said in a video announcing his candidacy.

“We are living in a pivotal and dangerous moment in American history. We are running against a president who is a pathological liar, a fraud, a racist, a sexist, a xenophobe and someone who is undermining American democracy as he leads us in an authoritarian direction,” Sanders said.

“Now more than ever, we need leadership that brings us together — not divides us up,” added the 77-year-old, who stunned the Democratic establishment in 2016 with his spirited challenge to Hillary Clinton as he pushed for “Medicare for All,” free college tuition and other progressive themes.

“Our campaign is not only about defeating Donald Trump, the most dangerous president in modern American history. It is not only about winning the Democratic nomination and the general election,” he wrote in an email appealing to 1 million people to sign up to his grass-roots effort.

“Our campaign is about transforming our country and creating a government based on the principles of economic, social, racial and environmental justice.”

Trump’s campaign quickly hit back, saying that while Democrats may have embraced ideas Sanders promotes, the American people have not.

“Bernie Sanders has already won the debate in the Democrat primary, because every candidate is embracing his brand of socialism,” the Trump campaign said in a statement.

“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 an interview on Vermont Public Radio, Sanders outlined how he will campaign.

“What I promise to do is, as I go around the country, is to take the values that all of us in Vermont are proud of — a belief in justice, in community, in grass-roots politics, in town meetings — that’s what I’m going to carry all over this country,” he said.

During his insurgent 2016 campaign, Sanders ended up capturing 23 state nominating contests, winning more than 13 million votes and pushing the party to the left, generating tension between its establishment and liberal wings.

This time around, he has been among the leaders in opinion polls of prospective 2020 candidates — but faces a growing field of other liberal progressives who tout many of the same ideas he brought into the party mainstream.

Among those already in the Democratic race are fellow Sens. Cory Booker of New Jersey, Kamala Harris of California, Kirsten Gillibrand of New York, Amy Klobuchar of Minnesota and Elizabeth Warren of Massachusetts.

A number of high-profile Democrats are still considering presidential bids, including former Vice President Joe Biden and former Texas Rep. Beto O’Rourke.

Sanders could be well positioned to compete in the nation’s first primary in neighboring New Hampshire, which he won by 22 points in 2016.

On Monday, Harris was in The Granite State, where she said she’d compete for the state and appeared to take a swipe at Sanders.

“The people of New Hampshire will tell me what’s required to compete in New Hampshire,” she told shoppers at a Concord bookstore. “But I will tell you I’m not a democratic socialist.”

Meanwhile, Sanders also faces different pressures in the #MeToo era.

In 2016, some of his male staffers and supporters were described as “Bernie bros” for their treatment of women.

In the run-up to Sanders’ 2020 announcement, allegations emerged of sexual harassment of women by male staffers during his first campaign.

Politico and The New York Times reported several allegations of unwanted sexual advances and pay inequity.

Sanders apologized in an interview on CNN when the initial allegations emerged, but also noted he was “a little busy running around the country trying to make the case.”

He offered a more unequivocal apology as more allegations surfaced.

“What they experienced was absolutely unacceptable and certainly not what a progressive campaign — or any campaign — should be about,” Sanders said Jan. 10 on Capitol Hill.

“Every woman in this country who goes to work today or tomorrow has the right to make sure that she is working in an environment which is free of harassment, which is safe and is comfortable, and I will do my best to make that happen.”

On Tuesday, the senator said that among the issues that propelled him to seek the presidency again are health care, climate change, student debt, the “demonization” of undocumented immigrants, income inequality and gun violence.

“In a sense, this campaign is a continuation of what we did in 2016,” he said on “CBS This Morning.”

Asked how this bid would be different from his first run, Sanders replied: “We’re gonna win!”

With Post Wires