I didn't claim they were, only that I'd be surprised if more weren't. You're declaring that most of them aren't. On what basis do you make such a declarative statement?
There's no evidence that most of them are. They don't claim to be that far to the left. A few might be socialist, but the large majority of even liberal districts wouldn't go that far in this country. They say that they're liberal, that's evidence enough for me unless shown otherwise.
You need to consider this.
Then it's a matter of degree and not substance, which is what I said.
It's a matter of the two being different.
No, there are a number of substantive differences between conservatives and libertarians, particularly on hot-button issues such as abortion and gay marriage (conservatives seek to keep both illegal; libertarians favor both being legal), immigration (libertarians favor open borders; conservatives favor even greater restrictions than we have now), international interventionism (conservatives are often for it; libertarians aren't), a whole other raft of social issues, etc. Those are significant actual differences, not merely matters of degree.
Whereas, with progressives, socialists would welcome anything a progressive would want to do, but may want to go further with it.
And, of course, the difference is predicated on the idea that there could a point at which progressives would say "OK, we've done enough" and then stop. Do you really think they would?
A campfire and a forest fire are both fires in the woods. Yet, I'd be a fool for equating them. Progressivism is a large camp. It doesn't have defined boundaries where you say, if you believe in this, "You're not a Progressive." Same thing with Libertarianism. Most Libertarians believe in a little more government than police and courts. Where do you draw the line of socialism? Simply comparing a Progressive with a Socialist is foolish. They do have differences