US Senator Bernie Sanders took aim at Donald Trump as he launched his 2020 presidential campaign with a message of unity, equality and working class values in Brooklyn, New York.Senator Sanders, a Vermont independent and the runner-up in the 2016 Democratic presidential primary, on Saturday was cheered on by a crowd of thousands who came out in the snow and freezing temperatures to see him speak at Brooklyn College, right near where he grew up as the son of a Jewish immigrant and lived in a rent-controlled apartment.In his opening remarks, Sanders described Donald Trump as “the most dangerous president in modern American history” and affirmed he was saying “loudly and clearly that the underlying principles of our government will not be greed, hatred and lies. It will not be racism, sexism, xenophobia, homophobia and religious bigotry. That is going to end.”After Brooklyn, Mr Sanders will travel to Selma, Alabama, where he will be among the politicians commemorating the anniversary of the 1965 clash known as Bloody Sunday, when peaceful demonstrators were beaten back by Alabama state troopers as they attempted to cross the Edmund Pettus Bridge. He’ll hold his second campaign rally in Chicago, where he attended the University of Chicago and was involved in civil rights protests.Australia Network