On May 3rd, several groups including Earth Justice, Center for Biological Diversity, Natural Resources Defense Council, the Sierra Club, and others joined with Alaska Native groups to sue the Trump administration for its reversal of the Arctic drilling ban.
The complaint states there is no Constitutional authority for Trump to reverse a Section 12(a) withdrawal, the authority President Obama used to ban Arctic drilling. In the complaint, the claim for relief states:
In reversing President Obama’s Arctic and Atlantic Ocean withdrawals, President Trump acted in excess of his authority under Article II of the U.S. Constitution and intruded on Congress’s non-delegated exclusive power under the Property Clause, in violation of the doctrine of separation of powers.
The lawsuit is in preliminary stages, and so far, no group has asked to intervene on behalf of the government, though I expect this to change.