Here's Kevin Drum (quoting Paul Krugman a lot) on the subject of the proposed Comcast absorption of Time-Warner Cable.
I must admit that my attitude has been more or less that these companies are so huge and so powerful, it doesn't matter a lot if they get more powerful. It's like if you have King Kong and Mighty Joe Young stomping around. Does it really matter which one steps on you? If they teamed up and one climbed on the other's shoulders, would it be much different if they stepped on you with their combined weight?
But probably with cable providers, it would for reasons Drum and Krugman state. And it's going to be a tough deal to block because there's a powerful group of people in this country — including for some reason, a lot of very poor folks — who think the most immoral, awful thing the government can do is to prevent anyone from making as much money as possible, no matter who it hurts. The only reason bank robbery is illegal these days is because when it occurs, the money flows from the wealthy to the poor.