I’d point out the work of Lina Kahn under the Biden administration as head of the FTC was very progressive until it was dismantled by the current corrupt administration.

en.wikipedia.org/wiki/Lina_Khan

Be that as it may, any real progressive movement is almost certainly unintentional, given the ruling parties’ record on everything that isn’t wholly symbolic.

Go vote in a primary.

The Dems rig their primaries, and not only that, they argued publicly in court that they have every right to do so.

The things is that they do have the right to do so. If they were to simply, unilaterally declare which candidates they’re going to put forward that too would be perfectly legal. There is no law mandating primaries. The parties are Independent organisations and how they pick their candidates is entirely up to them. If you were to create a brand new party and pick which candidates you’re putting forward by drawing straws that would be perfectly legal too. Both parties just choose to hold primaries because for one thing it picks a candidate more likely to win and secondly it obscures how much democracy has been undermined in the US. The systems have been rotting well before Trump.