The majority of Americans believe the Federal government should provide health care [1][2].
The current Democratic Party is essentially "Republican Lite", Republican with a happy face on it. Democrats as a whole are more interested in defeating progressives and leftists than they are in defeating Republicans.
[1]: https://news.gallup.com/poll/468401/majority-say-gov-ensure-...
[2]: https://thehill.com/policy/healthcare/351928-poll-majority-s...