Right: B-1ski.
"copy" "failed": I do not think those words mean what you think they mean.
1 The Tu-160 is actually a development of the 60s Myasishchev M-18 design
2. compared to the Bone, the Tupelov carries more, faster, further.
Actually...no, not failed at all.
Very expensive for the Ruskies...and they only built 36 or so of them, of which I believe 25 are still in service.
But the Blackjack is a very decent and capable bird...not to be underestimated.
It has a larger payload than the Bone, and is in fact supersonic (Mach 2), built really to mimic the B-1A.
Russian electronics are not as good as ours by far...but they do know how to build decent aircraft...and this bomber remains a very real threat.