Bernie Sanders launches second bid for US president:

Senator Bernie Sanders on Tuesday launched his second bid for the White House, taking direct aim at Donald Trump in an announcement that calls the US president a “pathological liar.”

Sanders, 77, joins an already crowded field of candidates seeking to win the Democratic nomination and take on President Donald Trump in 2020.

He made the announcement in a radio interview with a station from his home state of Vermont.

I wanted to let the people of the state of Vermont know about this first, Sanders said on Vermont Public Radio.

The self-described Democratic socialist gave an outline Tuesday of 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 grassroots politics, in town meetings — that’s what I’m going to carry all over this country, he said.

In a video announcing his candidacy, Sanders called Trump pathological liar and a racist.

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, he said.

He also highlighted policies he will advocate on the campaign trail: healthcare for all, raising the minimum wage to a “living wage," land combatting climate change.

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

Our campaign is about taking on the powerful special interests that dominate our economic and political life, he said, naming Wall Street, health insurance companies and the military-industrial complex, among others.

Sanders, who caucuses with Democrats, made an unsuccessful bid for the presidency in 2016, losing out to Hillary Clinton, who was in turn defeated by Donald Trump.