Backfire bombers: Reach USA ?

There was some cold war era movie that starred Rock Hudson as the
President about 25 years ago.

I can't remember the name, but I think it might have been called World
War 3.

There was one scene in the movie where they talked about how as
tensions had risen, the Soviets had sent their Backfire bombers over
Seattle as a show of force.

But weren't Backfire Bombers later found to have never been anything
more than a medium-range bomber ?

Was the movie realistic in having Backfire bombers being sent to the
continental USA ?