Democratic Party leaders tried to rise above the incident.
However, his prior efforts to reform the nomination process had reduced the power of Democratic Party leaders.
That is taking place despite the efforts of Democratic Party leaders to protect the candidates from this situation.
Democratic Party leaders have sponsored a lawsuit accusing the union of violating campaign finance laws.
Democratic Party leaders have vowed to continue raising the issue until they receive an explanation of how the shares were acquired.
These ads were met with hostility from top Democratic Party leaders and consultants.
The public may be surprised to learn these results, but Democratic Party leaders are not.
Democratic Party leaders - whom he refused to name - have tried to convince him to drop out, he said.
Democratic Party leaders said they would try to learn from the election, but mostly criticized the management of the vote.
Democratic Party leaders said they supported the senator in the primary, but would not say much more.