Two union leaders and longtime Democratic National Committee members have resigned from the national party, marking the latest internal dispute of chairman Ken Martin’s tenure.

The Democratic Party faces new turmoil as top labor union presidents exit DNC, citing concerns about party leadership direction in a resignation letter to Chair Ken Martin.

"I don’t think you intended this, but you essentially destroyed any chance I have to show the leadership that I need to," Martin said, speaking to Hogg.

In leaked audio from a private DNC meeting in March, the group's Chair Ken Martin made a stunning admission while admonishing Vice Chair David Hogg.

The head of a prominent U.S. teachers union resigned from her position in the Democratic Party on Sunday, saying she was "out of step" with its leadership. Randi Weingarten, president of the American Federation of Teachers union,