I'm not so sure. There are a lot of people not voting at all, and there's a lot of toxic hate towards the Dems. Unfair, based largely on lies, but that doesn't change the fact that a lot of people vote against the Dems and their own interests because they believe the lies. A lot of Republicans are disappointed with Trump, but still unwilling to vote Dem.

A clean slate might actually do a lot of good. I do think you'd have to position the party not so much as Progressive, but as "fixing the broken democracy, representing the people rather than the corporations, fixing the overpriced healthcare system", etc. Present a fact-based, people representing center. Offer sane compromises for the culture war issues (abortion access for rape, medical problems and the first 12 weeks, no abortions of healthy fetuses in the last trimester). That gives conservative voters something that sounds totally reasonable and the GOP can't point out that this still legalizes 90% of abortions without revealing they always lied about late term abortions. Do the same with every other culture war issue, while driving home on the issues that actually matter and everybody overwhelmingly wants: cheaper, better healthcare, no corporate money in politics, etc.

I think if you do this big enough (but that's the really hard part), then you might just knock one of the other parties out. Offer a better alternative to both of them, not a more extreme version of one of them.

And you're not going to get ranked choice voting without a new party.

However, there are a lot of people who don't vote, and a lot of people who are unhappy about both parties. There are Republican voters disappointed in Trump who still can't bring themselves to vote Dem because of all the propaganda they've put in their heads. A jew party would be a fresh start.

A bigger problem is making it an actually big party, getting media attention, getting money to campaign with, etc. US politics runs on money. Because yet another Green or Libertarian Party won't be helping.