The DNC is now the party of the neocons. Maybe Trump is so bad it's "necessary" but arguably in a two party duopoly that's effectively a sealed system, you're just swapping voters with the GOP to wind up still relatively 50/50, and I'm skeptical there's a geographical advantage to upper-crust, legitimately evil former republicans, who don't care for Trump's uncouth antics, as presumably most of those voters live in districts that are already blue-ish. You're literally giving up pro-peace voters in random districts across the country, potentially in tightly contested congressional districts, to run up your VA margin of victory.