Daniel Larison on Ted Cruz: "Of course, being intelligent is no guarantee of good judgment, and when combined with a combative temperament it can make a person downright unbearable."
UPDATE 1:20 PM: Related: "Me & Ted." As for me, I would put up with some degree of obnoxiousness if I thought the positions and ideas were good. But no.
UPDATE 1:30 PM: I should add that a politician I've been writing about long-form was often characterized similarly, which is more palatable once some real things have been achieved.