The B-58 probably could have penetrated Russian air space at altitude back in the day, it had a short career. The B-1A was designed as a high altitude supersonic bomber, but it was halted and eventually redesigned as the B-1B that would go in at low altitude. (It's nickname is the "Bone", beautiful plane.)
The B-2 might be able to traverse Russian airspace to at least some degree, but as noted, we only have 20 of them.