US Senator Bernie Sanders has launched his bid to be president in 2020 with an attack on corporate greed and a promise to unleash a "political revolution".Speaking in Brooklyn, New York, he called Donald Trump the "most dangerous president" in recent US history.
Mr Sanders, a 77-year-old independent senator for Vermont, lost the 2016 Democrat race to Hillary Clinton.
He faces a much more crowded field this time but brings name recognition and a passionate support base.
More than 10 others are also running to be Democrat candidate, including Massachusetts Senator Elizabeth Warren, New Jersey Senator Cory Booker and the Mayor of San Antonio, Texas, Julian Castro.
What would a Sanders presidency look like?
His speech promised a presidency that would "bring people together". He outlined numerous policies and attacked greed and the "billionaire class". As president, he said he would:
Enact a "federal jobs guarantee" to ensure all Americans have work
More than double the minimum wage from $7.25 (£5.50) to $15
Pass "comprehensive" immigration reform, including allowing hundreds of thousands of undocumented migrants to stay in the US
Make universities and colleges tuition-free
Reform healthcare to give universal coverage
He promised to fight for "economic justice, social justice, racial justice and environmental justice".