(CNN) Hillary Clinton is not considering Bernie Sanders as a running mate, a Democrat familiar with the decision tells CNN.

Sanders, who has still not yet officially conceded the Democratic presidential primary to Clinton, was not expecting to be considered as Clinton's vice president and he does not view her decision as a slight, according to a person close to him.

Instead, Sanders remains committed to changing the Democratic Party, and not "becoming her partner."

He would risk being considered a sell-out by loyal supporters if he joined the Clinton ticket, another person close to Sanders said Wednesday, so the news is not unexpected.

The Vermont senator did not bring up the issue in his private meeting with Clinton on Tuesday night that lasted about 90 minutes.

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