It's interesting that you would cite local monopolies as the problem. What I expected to see in this thread was, "The feds should do more to build a national broadband infrastructure," with the usual assumption that the US federal government is and should be all-powerful and in charge of controlling the economy.
There might be a valid argument that the Commerce Clause bans state and local governments from imposing regulations that prevent interstate competition, and that such regulations should be struck down. I'm not hopeful about that though, because the same argument applied to health care competition, and Congress' response was a 2000+ page bill it didn't read, meant to create competition only through a massive, centrally-controlled new bureaucracy backed by unprecedented forced-purchase rules.
If Congress moved to "fix" our Net connections the same way, everyone would be ordered to buy broadband or else, and do it through a government-organized collection of ISPs. Michael Moore would be telling everyone that Net access is a fundamental human right and that Cuba does it better. We'd be citing existing regulations as proof of the failure of capitalism, and calling for the government to just take over the whole Net industry.