Flexibility has been a hallmark of great progressive and left leaders. Lincoln¬†and Douglass displayed it in their time. Roosevelt in the Depression and War years. King in the civil rights era. Obama more recently. A refusal to make any adjustments in program, demands, organizing themes, and tone, no matter what the situation, may seem admirable on its face. But in a practical sense, it can easily turn into a fool’s errand and script for defeat.