I would still welcome a primary challenger against her from the left, since her 2020 presidential campaign shows that she isn’t actually principled about her beliefs (and I would prefer someone as principled as Sanders).
I wouldn't question her ideological credentials. I do think she genuinely believes in the ideas she's espoused, but was more willing to put her own chances for victory over the general cause's. What was more alarming was her endorsement of the Bernie Bro crap, which was very obviously a smear campaign that was used in bad faith to attack progressives and
had life well past Bernie's presidential ambitions.Regardless, she has my endorsement. Most of her left-wing challengers would be hyper-Online lunatics.