The New York Times looks at the group of close advisers and consultants surrounding Hillary Clinton and notes her emphasis on discipline and loyalty in picking associates:

“In fact, political strategists say they are struck by the similarities between Mrs. Clinton's inner circle and the team surrounding President Bush, who has placed a premium on loyalty since his days as governor of Texas and whose lieutenants are known for falling in lockstep behind him.”

However, the NYT does not deny other possibilities:

“A harsher explanation for the camp's cohesiveness is that Mrs. Clinton's top lieutenants do not tolerate anyone who goes off message, risking a spoken word that might be viewed as unflattering to Mrs. Clinton.”