EDIT: To the people downvoting this post because democrats > republicans: you’re missing the point.
DC democrats do not represent Democrats nationally, but if you find that compelling, far more local Democratic groups support it:
- Alameda County (CA) Democratic Party
- California Democratic Party
- Colorado Democratic Party
- Maine Democratic Party
- Massachusetts Democratic Party
- Minneapolis, MN DFL Party
- Progressive Democrats of America
- Progressive Democrats of Los Angeles
- San Francisco (CA) Democratic Party
Compare which cities and states have implemented RCV in the US, (mostly blue,) and which states have outright banned its use (mostly red.)
Democrats did a big push for RCV in 2019, and while the Biden administration hasn't weighed in yet, the Obama administration he served in supported it.