OK, ouch. The Dem declares victory, the Republicans want a recount in a district Trump won handily.
OTOH, the Dem candidate, an ex-Marine who is only modestly left of center, is hardly the type Dems are likely to run nationwide. Or, if the Dems do elect a bunch of Reagan Democrats to the House next fall, the opportunities for bipartisan cooperation might go up. MAYBE! More likely, those swing-seat Dems will be a minority within their own caucus and will be expected to walk the plank in pursuit of the latest far-left brain waves.
But that won't be crossed until next fall. Sufficient unto the day is the bitterness therein, IIRC.