My experience in transferring to USA-bound flights at CDG is that this is a very short connection. If your inbound plane arrives on time and you run, you will likely make it -- but it will take at least 45 minutes of huffing and puffing. If any little hiccup occurs (e.g., long lines at security, 15 minute delay in arrival, slow bus from stand, etc.) there is a good chance that you won't make it.
Note that even though you are arriving and departing from 2E, this does not mean that you can walk between gates. 2E has satellites that are only reachable via bus or tram. Furthermore, USA-bound flights are generally served at a satellite separate from all others to allow them to do secondary security screening.
Good luck.