Ken Martin is in survival mode.

Desperate to save his job as chair of the Democratic National Committee, he is avoiding media appearances, monitoring his critics’ social media posts and refusing — at least so far — to make any substantive changes at his troubled organization.

A half dozen state leaders and other committee members, most of whom spoke on the condition of anonymity to discuss internal conversations, described Martin as defensive and extremely distrustful of others, even some people on his own team, as calls for his resignation grow louder among Democratic operatives who lament his leadership decisions, lackluster fundraising and even his tendency to lash out in anger.

But there is no sign that the organization’s membership plans to replace Martin before the midterm elections in November, even as some wonder how much longer he can hold on. The drama threatens to undermine the party’s momentum in the battle to retake control of Congress from President Donald Trump’s Republican Party.