From the NYT:
Two advisers to Mr. Sanders said he thought Mrs. Clinton had said many of the right things at the meeting, but described him as concerned that she might embrace more politically moderate positions later if she thinks it necessary to win states like Florida, Ohio and Virginia.
The advisers, who spoke on the condition of anonymity because the campaign had not authorized them to speak, said Mr. Sanders felt no pressure to endorse Mrs. Clinton quickly. And he has leverage: He accrued about 12 million votes and nearly 1,900 delegates, and in a New York Times/CBS News poll last month, 28 percent of his supporters said they would not vote for Mrs. Clinton if she was the Democratic nominee. Mrs. Clinton picked up nearly 16 million votes and 2,800 delegates.
Two advisers to Mr. Sanders described him as concerned that Mrs. Clinton might say all the right things now but embrace more politically moderate positions later if she thinks it necessary to win states like Florida, Ohio and Virginia.
The advisers, who spoke on the condition of anonymity because the campaign had not authorized them to speak, said Mr. Sanders felt no pressure to endorse Mrs. Clinton quickly. He wants her to take steps to win his confidence in the five and a half weeks before the Democratic convention, where his voters and delegates expect him to speak and Clinton advisers hope he will give a full-throated speech backing her. (Emphasis mine)
There is nothing like the ego of an older white man. It is really something to see. He worked with Hillary Clinton for 8 years in the Senate, voted for her as Secretary of State, watched her win this primary handily, and he still feels able to demand that she "take steps to win his confidence" in order to receive his endorsement. I can not wait until Secretary Clinton, President Obama, and everyone else with two brain cells to rub together kicks this old crank to the curb.