After months of bitter fighting, the United States Supreme Court vacancy left by the death of Justice Antonin Scalia has finally been filled with the confirmation of Justice Neil Gorsuch on April 7, 2017. What this means for state tax issues that are ripe for Supreme Court review—retroactivity, the death of Quill, etc.—will certainly be the subject of much debate and prognostication.  One thing that seems quite clear, based on his record in the Tenth Circuit, is that when given the chance, Justice Gorsuch will likely conclude that the deference standard that currently applies to judicial review of agency regulations is too lenient, and that the power of the administrative state should be curtailed.