Saljen

You should use the technology that Justice Democrats and other progressive groups have available. Being able to accept donations online will drastically increase your chances of success. If you put in the effort to set something like this up, I'll be happy to be one of your first donors.

Too many people vote down party line for that to be viable. While I agree with your premise, we'd need to fix gerrymandering country wide and replace First Past the Post with some sort of Ranked Choice voting system for any of that to be possible. Our system is broken, to fix it you need to get elected. To get elected, you need to play by the rules of the existing system; not the rules that you want to exist.

What I propose is that the Public Option be re-inserted into the Affordable Care Act, administered by Medicare. Individuals in the marketplace may choose to purchase from Medicare

What do you say to people who say that this is nothing but Democrats trying to keep their donor base (ie: health insurance companies) alive and well, rather than providing actual single payer insurance for Americans like the rest of the civilized world has? This plan just seems like ACA 2.0, another Republican plan to keep the donors alive.

Justice Democrats are just Democrats who have agreed upon a set of progressive goals and have agreed to help elect fellow Democrats who support those goals. Check out their page and see what they stand for.

Other groups worth checking out are Our Revolution and Brand New Congress.

The only people that "aggressive progressive" will scare off is people who wouldn't consider voting for you anyways. Those who don't normally vote need someone to push policy that affects their lives positively in order to be convinced to get to the ballot box. In my opinion, that takes an "aggressive progressive", so don't change a thing.