I’d support a primary challenge to Van Drew. The idea that being Republican lite is a huge electoral bonus to Democrats has far more evidence against it than for it (I know that the usual suspects will come after me for having the audacity to question this obvious proven truth, but whatever, come at me.) This is going to be a hard district to defend either way, and Van Drew hasn’t exactly proven himself to be a remarkable candidate.
Van Drew isn't a "Republican-lite," he's an extremely radical democrat who is simply having a rare moment of sanity.