If Congress, then yes, it can and MUST be undone. If Obama....then that's that and it can't be undone, as was the case when Clinton pulled this stunt.
There's something about it being a "national monument", which makes it different than just an ordinary Bill. Check out what Clinton did and what happened when W tried, with all his might, to undo that POS mess.
We’ll pray for a miracle.
A case is sent up to the SC and President Trump’s 5 newly filled SC seats rule in his/our favor!
: )