The problem with that is that she has gotten a lot of name recognition. Shes in the news all the time, headlines about her support, on CNN, MSNBC, and Fox.
I don't think her national name recognition is all that high, to be honest. I wish there were more pollsters testing the favorability #s for the likely 2020 candidates, so we could get a better read on their name recognition, but here's a Fox poll from January, that has her national favorability at:
https://uselectionatlas.org/FORUM/index.php?topic=283045.0favorable 18%
unfavorable 17%
don't know 65%
So only a third of respondents have an opinion of her, though it's a bit higher for Dems. My recollection is that that's similar to what other polls have shown, though I don't think there have been any that tested her favorability in the last few months, which is why I had to go back to January.
For whatever reason, the 2020 Dems have been mostly unsuccessful so far in becoming well known. Contrast that with the Republican field four years ago at this time, when folks like Christie, Cruz, and Rubio all managed to get more than 50% name recognition despite never having run for president before.
