“But it’s one thing to advocate something knowing that you’re going beyond the current viewpoints, and another to make it a litmus test,” he said.
This is his most important statement. The party needs to accept that Democrats are not losing on trans issues, police accountability, etc. Most of these issues are supported by large majorities of Americans. That does not mean that those issues need to be front and center in every election. It can be implied by prior statements how a candidate will vote when in office and that can be enough.
But there is a problem if we have Democrats running actively against progressive issues, or candidates taking right-wing bait and declaring that they are ready to toss progressives under the bus. Or Democrats who haven't the balls to declare their support for issues already supported by a majority of Americans. Those Democrats will bring the party down with continued losses.
For example, any Democratic candidate not willing to declare that we need to put the brakes on our continued unconditional support of Israel won't win. Any Democratic candidate who doesn't support women's right won't win. Any Democratic candidate who says they don't support socialism had better be ready to explain how they understand "socialism" and if they understand the difference to Democratic Socialism. Call those litmus tests if you want, but they are the reality.