So.... with voters under 50 he has a +26 approval, yet for re-elect, it's -1? That makes no sense. There are voters who approve but would vote for someone else but that is a ridiculously stark difference.
Well think about this, Charlie Baker has/had 70%+ approvals and won 2/1 in his gubernatorial re-election but would easily lose any Senate race against a Democratic nominee. Congressional elections are more about partisanship than anything else. There's a lot of similarities between Scott Brown and Doug Jones and how they got elected, but in all likelihood, Jones will lose by more than Brown just because there are less persuadable voters in Alabama.