Chips and TimTurner, both moderates, face off in a Dem primary with only two candidates of significance. Chips becomes the anti-establishment candidate in name only, and TimTurner becomes the establishment candidate in name only. TimTurner's personal opinions on abortion costs him CT, NJ, and most of the Western US. However, TimTurner's pro-union stances wins him union endorsements, and he also wins support from key Democratic constituencies due to his support for priorities like raising the federal top rate of taxation, as well as his opponent being far from a perfect fit for the party as a whole either. Both candidates win their home states. TimTurner is a moderate well-suited to the South, and Chips is a moderate well-suited to the Midwest; both win most of the states in those regions. The race is a nail-biter from start to finish, with Tim's lead in the Northeast being matched by Chips' leads in the West. Tim manages to nab a narrow win due to his margins in the South.
(apologies if I'm selling you short, Chips. I just don't know much about you and made the assumption that more of your views would be seen as "heretical" by the Dem base)