There is talk. But the cost to build rail is so stupid in the US. You spend billions... connect two cities.. and then what? You can't get around in many cities without a car, so you are still stuck.

Kind of a lot of problems on top of each other from construction costs to land ownership to right of way to city layouts that make trains rough to work in the US. (which stinks, I LOVE trains. had a nice train commute in Chicago, but those are rare in the US)