Analysis of several post-Chevron cases indicates that every major Supreme Court case since 1984 involving the validity of a Treasury regulation is consistent with Chevron. Indeed, since 1984 every challenged Treasury regulation interpreting a statute in which Congress failed to address a specific tax issue has been upheld by the Court. In fact, no Supreme Court case since 1984 could be discovered in which the Court invalidated a Treasury regulation on the grounds that it was an unreasonable interpretation of a statute. Several post-Chevron Supreme Court decisions, however, rejected the Treasury\u27s application of a tax regulation to a particular factual situation. Additionally, there have been times when the Court failed to defer to the Tr...