Democrat Senator Bernie Sanders has announced his second bid for presidency in 2020.

Bernie Sanders, 77, became a progressive political star in 2016 although he lost his candidacy bid.

His campaign says it raised $1 million within three and half hours of launching.

An outspoken critic of President Donald Trump, the Vermont senator has described him as a “pathological liar” and “racist”.

Bernie Sanders – an independent who caucuses with the Democrats – is one of the best-known names to join a crowded and diverse field of Democratic candidates, and early polls suggest he is far ahead.

His calls for universal government-provided healthcare, a $15 national minimum wage and free college education electrified young voters, raised millions of dollars in small donations and are now pillars of the party’s left wing.

Bernie Sanders, who lost the 2016 Democratic primary to former Secretary of State Hillary Clinton, said in his email: “Three years ago, when we talked about these and other ideas, we were told that they were ‘radical’ and ‘extreme’.

“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.”

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President Trump, speaking to White House reporters on February 19, wished Bernie Sanders well on his second bid.

The president said: “Personally I think he missed his time. But I wish Bernie well. It will be interesting to see how he does.”

“He ran great four years ago and he was not treated with respect by [Hillary] Clinton and that was too bad,” Donald Trump added.

President Trump added that he liked Bernie Sanders as they both have been “tough on trade”.