> She absolutely "could" have stayed in with a real shot at winning, which was true for basically all of them.
This was true for three of them: Sanders, Biden and Buttigieg; but if Buttigieg stayed in, it was looking like at the time that he and Biden both would have lost to Sanders. I remember my last act as a registered member of the Democratic Party was going to be to vote for the candidate who had the best shot at beating Sanders in my State specifically thus denying him some delegates, and I was having a difficult time up until nearly the last minute figuring out who that was going to be up until Buttigieg made the decision extremely easy by removing himself from the race.
Harris didn’t even make it to the starting line. Her campaign simply ran out of money in December before the Iowa Caucus.