Doubtful. Best case scenario is the old leadership literally dies off. Because any real progressive organization is deemed a Iranian, Russian, or communist and gets zero funding. Sad truth is, if all the progressives pooled all their none essential resources and money they still wouldn’t scratch the amount of money the two major parties spend on TV ads. Honestly. A collapse of the US is more likely to bring about a progressive change than any “conventional” processes.
I think we need to reform the Democrat party or wait for the collapse of the US so a progressive change can happen.