It's now very hard to find a Democratic politician who calls him or herself a liberal. When pressed, most will say they prefer the term "progressive." But there are two problems with this. First is that "progressive" already has a meaning in American politics. It refers to an early 20th century movement and party that was responsible for reining in corporations, extending the franchise to women, establishing direct democracy, creating a tiered federal income tax, etc. They also didn't like immigrants or the existing political parties of the time and creat
Now, I recognize that languages and words evolve over time. "Federalist" doesn't mean today what it did 200 years ago, for example. But in this case, there's no real value in referring to those on the left as progressives. That's the second problem -- "progressive" in the modern definition conveys no information that "liberal" doesn't convey. Liberal politicians just want to be called progressive because the word liberal has become unpopular. I suppose in a few years, when "progressive" has become unpopular, some left-leaning politician will asked to be called a mugwump or something. But a) it won't contain any additional information, and b) it won't be true.