Wow Fred sounds like you have it out for the first state...but you are correct and I believe the Salisbury stations have bureaus in Dover don't they?
Yes, they do. And both provide extensive coverage of Dover and the two downstate counties.
I believe, unless it moved, WBOC is on the northbound side of US 13 as you make your way from Camden, DE up to State Street. Where is WMDT's bureau?
North and south of the canal have little in common and should not be considered part of the same geographic or political region. Wilmington and Delaware north of the canal is clearly in Philadelphia's metro orbit, however Rand McNally draws their maps.
Or AAA.

Or the US Geological Survey.

Or Mason and Dixon.

South of the canal is more like a part of Maryland's eastern shore region.
Right down to being serviced, depending on the area, by either Delmarva Power or Choptank Electric Cooperative or Delaware Electric Cooperative, except for municipalities like Dover, Milford and a few others that have their own electric utilities. If said Messrs. Mason and Dixon had drawn their line down the middle of Chesapeake Bay instead of where they did, there'd be nine more sales-tax free counties on Delmarva (well, maybe eight, if the two Kent Counties consolidated [they border each other]).
Politically, Delaware acts more like a county than a state. Even the one congressman and two senators act like local ward heelers and show up at any opportunity to cut ribbons, shake hands and kiss babies (partly because Delaware is so small and party because Delaware is close enough to DC they can commute to work).
Oh yeah. I've seen Senator Carper at two different Blue Rocks home openers. And as Governor, he showed up one Friday at the small-company imaging facility where I was working at the time.
ixnay