It seems that a lot of the local news channels now show network or syndicated content most of the time they are on the air. Just pull a story off the media service and air it. Such practices would make it harder to pull together a collection of "local" newscasts as such content would not be licensed outside of each local station's market.
True -- if I recall correctly, WGN Midday News wasn't carried on WGN America for a time because it included a pre-produced syndicated feature ("Mr. Food" or something like that).
Often, the syndicators even provide the anchors with suggested text for the intro.