The new president can (and pretty much did) cancel all of the previous administration's orders.
Perhaps it is some "law" but the point is, it's a work around so that leases and permits can be issued for the gulf.
America has more "energy" than anywhere else. Putin's wars are about "profit" from "energy". The gas pipelines, overland shipping and overwater shipping are the true reason for the "war". Take away Putin's "profit" by competing and ensuring an energy supply to our allies, war ends.
When America is a net energy exporter, inflation is lower, gas prices are lower, home heating is lower, the world is more economically stable, people like Putin have less power to invade other countries.
BTW: Putin says the "war" it is "to protect ethnic Russians". Then "Russian" ships having "accidental anchor drops" and cutting the power and communications cables between the "Icelandic" countries and Estonia is because Estonia is next after Crimea and Ukraine.
Denali isn't anywhere near any oil.
Ok. The more I think about it the more I remember that Alaska may have asked for the rename but I don't remember that well and I haven't researched it. I will be doing more reading regarding the reason Obama changed it.
Trump is a "conservative". Renaming by Obama this is not "conservativism" it is changing. If it was change for the sake of change, putting it back is conserving for the sake of conserving. It could also be putting it back to "snub" Obama but I doubt that because there is no advantage to the American people in snubbing a past president.
The next bit is tongue in cheek, not serious.
Be careful how far you take the "undo all" transgressions idea. You could be forced back to the south or forced back to Europe where your ancestors came from (remember it's a joke). Then we could of course take it all farther and make the descendants of those that crossed the land bridge go back to where they came from. Afterall those "first peoples" are responsible for wiping out the mammoths.
Along the lines of modern people "paying for" transgressions of the past. How come Spain gets a pass on racism. Spain was the first to bring people from Africa to the "new world". Spain brought the diseases that killed off most of the first peoples.