People who spend a lot of time shopping their left/progressive credentials and defending their left flank from attacks from others on the left are doing themselves no favor. In doing so, they can lose their capacity to respond to changing conditions of struggle that require strategic shifts, tactical flexibility, and novel approaches. In the present election process, we see some evidence of this phenomenon.
I would like to say that militant posturing of this kind is a new arrival on the field of politics, but it isn’t. Dates back to the sixties where it was more the rule than the exception. Now the reverse is true.