Klobuchar and Buttigieg are running as Republicans in a field of Democrats. Neither will be the nominee but they’re doing so to boost their own brands, as fiscally conservative Democrats, instead of in the service of
Biden, Sanders, Booker, Yang, Harris, and Warren somehow manage to run positive, ideas-based campaigns. Gabbard is running a purely negative campaign against Biden and Warren while Klobuchar and Buttigieg are one trick, “how can we pay for this” ponies. The fact that the rest of the field has largely ignored their attacks speaks to the field more than it does the candidacies of the three I listed above.
Running divisive campaigns in the run up to Trump is pretty odious, imo.
Cory Booker, a centrist in this group, clearly won the debate (imo) before y’all get your “you’re a Bernie Bro” circle jerk going.