I mused in a prior thread on this topic:
Delaware has enough of a Black population (one of the top 10 by proportion in the country, actually) and bougie suburbanites to keep it at least decently in the Dem column even if much of the WWC bleeding continues, especially since its state Democratic party is very neoliberal and pro-business (as president, Joe Biden now appears significantly to the left of your average Delaware Democrat; look at Tom Carper as a typical example).
Margins for Dems are at times a bit close for comfort there, but the quirks of the state party and the high Democratic floor in the state are a fair bit to overcome. Maybe it could return to a prior state of downballot wonkiness (it had a Republican Treasurer from 1989 to 2019, for instance, and the governor's chair once favored Republicans), but it would take some more serious realignment for it to become federally competitive like it was in the latter half of the 20th century.
Or who knows, maybe the Independent Party of Delaware will become a relevant political force.
