Need I say more.
When they get to D.C. the leaders take them by the hand and read them the riot act.
The moderate Dem is Ceullar and he is already in office. He's a known quantity who has supported Bush tax cuts.
Again, this is a Democrat district and the choice is moderate Dem incumbent vs hard-left Dem. CLub for Growth has favored the more conservative GOP primary candidate, and this unusual choice extends the same logic into a Democratic primary.