Bernie Sanders briefed by U.S. officials that Russia is trying to help his presidential campaign The Washington PostSanders told Russia is trying to help his campaign CNNFormer Goldman Sachs CEO: 'I might find it harder to vote for Bernie than for Trump' POLITICOWhy Sanders Will Probably Win the Nomination The New York TimesRyan Girdusky: Could Dems cost themselves the presidency by taking Sanders' supporters for granted again?