Tens of millions of voters are de facto disenfranchised by nobody from either party representing their interests. Hell, a lot of the poor people who have been tricked into voting Republican because they at least PRETEND to care about poor people would NEVER vote for a corporate pro-billionare democrat but would be very likely to vote for a progressive one that ACTUALLY fights for them.

As a progressive, let me say, you are delusional. Sanders proved three things:

1. You can legitimately champion free college, legal weed, free healthcare, and student loan forgiveness, and young people still won't go to the polls in overwhelming numbers. If they did, they'd easily decide the winner in every single election. And as someone who also falls into the young person category, there is no excuse that older folks don't also have to deal with.

2. If a silent majority of pro progressive non voters existed, it clearly pales in comparison to regular voters.

3. Or, this silent majority doesn't exist.

You're looking for a hail Mary where there is none. Either you work in a left of center coalition to make as much progress as you can against people who want children to starve, or you can continue to wait for an ideologically pure path to show itself.