This is kind of hard to answer without more context. There are political organizations that rank members of Congress based on their voting record (e.g. did they vote yes or no on a piece of legislation deemed progressive, gun friendly, abortion friendly, etc). Keep in mind that comparing a Senator's "progressiveness" to a Presidential candidate is a bit of apples to oranges, as Senator's only have to win in a state, where attitudes are generally very consistent between both sides of the political spectrum, spare a few of the larger states which as you can imagine have very different cultures in one part vs another. Therefore, most Senate candidates can align with the majority view points on issues in their respective states and don't have to be as moderating as the typical Presidential candidate, who has to win across many diverse states. Obviously, Trump is a bit of an exception to the moderating approach of most Presidential candidates. That being said, most "progressive" voting score cards will show that almost all Democratic Senators currently serving vote > 50% of the time with progressive stances on issues. The ones on the lower end of the spectrum typically come from states that skew more middle of the road or even lean conservative. This is all to say that while there may be national popular support for certain progressive ideas, they are not usually reflected in Congress due to the population distribution vs state boundaries (a lot of our population is consolidated in a handful of states).

She and other progressives will struggle for a few generations as long as we still use the electoral college as our system to elect the president. In fact, I expect that our first female president will be a conservative simply based on the swing states (there are about 6 of them) that make or break each election (we can go into why that is, but its a very long American history lesson). The key take away is that the system gives a bit more weight to the smaller, less populous states, which also tend to vote more conservative. We move much more slowly towards social change than say Europe. The US is essentially 50 different countries all trying to agree on one thing.

Trump wants to barricade himself in the White House and not come out if Biden wins.

BBC have called PA for Biden now. 273, game over.