Al Franken
If you boil down his many books, both political and non-political, you soon realize that Franken has one basic skill: sneering, as Dennis Prager put it. He has a tremendous opinion of himself and always prepared to list all the ways you fall short of his perfection.
Democrats should also remember that he has a temper worse than that of Mike Hatch. The danger of an inopportune slur or misplaced fist costing him the election is significant.
There are many more intelligent, more civilized, more capable Democrats in the DFL. There is no need to stoop to Franken's level.