Criticism of Sanders' leadership abilities is nothing new. Steve Rosenfeld, a former Vermont journalist who served as Sanders' press secretary during his 1990 House campaign, wrote a book about his first successful statewide bid. In Making History in Vermont, Rosenfeld levels a tough assessment at his former boss, who passed him over for a congressional job at the campaign's end.
"At his best, Sanders is a skilled reader and manipulator of people and events," Rosenfeld wrote. "At his worst, he falls prey to his own emotions, is unable to practice what he preaches (though he would believe otherwise) and exudes a contempt for those he derides, including his staff."
Rosenfeld quotes Sanders himself in the book as saying, "Some people say I am very hard to work with. They say I can be a real son of a bitch. They say I can be nasty, I don't know how to get along with people. Well, maybe there's some truth to it."