Independent senator from Vermont will provide progressive test for Clinton as a Democrat in battle for party’s presidential nominationBernie Sanders, the Vermont senator whose clarion warnings on climate change and full-throated calls for banking reforms have made him a favorite among progressives, plans on Thursday to announce that he will challenge Hillary Clinton for the Democratic nomination for US president, his advisers have indicated.“Bernie for a while has said he’s going to make a decision at the end of the month,” said a close adviser. “On Thursday, he’ll put out a statement. Unless something dramatically changes in next 48 hours, he’s decided he’s going to run for president, and he’ll be launching his campaign in May up in Vermont.” Related: The pro-worker, pro-growth experiment in Greece is under threat | Senator Bernie Sanders Continue reading...