https://arstechnica.com/tech-policy/2019/03/judge-says-trump-cant-re-open-arctic-waters-that-obama-closed-to-drilling/

On Friday, a federal judge ruled that President Trump could not re-authorize drilling in Arctic waters after President Obama removed those waters from drilling in 2016.

If the Alaskan judge's ruling withstands appeal, it would mean that the Trump Administration would have to seek approval from Congress to re-open federal waters north of Alaska to oil and gas drilling. Congress, currently divided with a Republican majority in the Senate and a Democratic majority in the House, would be unlikely to agree to such a request.