I really, really want the regulators to stop this, but most people only have the choice of a single cable provider anyway. Where in the US do Comcast and Time W

I really, really want the regulators to stop this, but most people only have the choice of a single cable provider anyway. Where in the US do Comcast and Time Warner compete head-to-head? It feels as though they have divided up the country similarly to how the baby bells were after AT&T was broken up in 1984.