So, Harris does 7 points better than Klobuchar in the primary but does 6 points worse than her in the general? Yuh.
Probably because 1) Klobuchar is well liked among those who know her, but not their first choice, but more second and third choice 2) Voters are forced to choose between one of the two because Emerson refuses to include the undecided option and 3) Harris might have some kind of fan group who are highly enthuasistic of her (highly educated, blacks) but less appeal to swing voters / rural voters or less name recognition.