Election ratings

I am kind of curious about the TV ratings breakdown starting with the 6:30pm ET network newscasts. How each network channel does. How it breaks down by timezone (the west coast won't rate nearly as high when the curtain goes up around 7pm ET, but they should fair better after 11pm ET/8pm PT if the race hasn't been called because like most sporting events, east coast viewers would be asleep when the game ends). How local channels fair covering this in a 1 hour newscast at 10pm ET.