Well, maybe someday but not yet. I imagine RT is free to cable companies. In some cases, RT apparently pays for its place on the dial. I have a friend who has the bare basic package from Time Warner. He gets the broadcast channels, the shopping channels, the public access channels and a few others like C-Span. And he gets RT. So I suppose an arm of the Russian Government is paying Time Warner for the channel space. TW just picked up Al Jazeera America, which is owned by the family that runs Qatar. And they also air CCTV News, a service of the Chinese Government, similar to RT.
For a while, an arm of the Russian Government was paying an ethnic broadcaster with numerous AM stations to air The Voice of Russia (similar to RT, an English language news and informations service) on stations in NYC and Washington 24/7. A few months ago, the lease arrangement stopped in NY (1430 is now airing Spanish Religion). I don't know if it was discontinued in DC. I don't know why it was ended.