I can't speak to actual city boundaries, but
Las Vegas is one of the most political areas you will find. The city has councilman and the commissioners of Clark County seem to have more clout. Senator Reid's son is a commissioner in Clark. There is always constant in-fighting between the city and the county. Boundaries seem to be made by who has the most control at the time. One of my commissioner friends in Clark County spent 1 million on a re-election campaign and lost! Sounds a little like Chicago huh!!