The Supreme Court has agreed to decide whether there is a constitutional problem with Maryland’s unusual practice of not giving full credit to income taxes paid to out-of-state jurisdictions by Maryland taxpayers who have income arising in part from other states. (It provides the credit against Maryland’s statewide income tax, but not those paid to counties or cities.) Details at the ABA Journal, AP, Reuters, etc.; Comptroller v. Wynne at SCOTUSBlog. It will be nice to get a definite answer one way or the other, but wouldn’t it also be nice if we had a governing class that wasn’t so blatant about grabbing for double-taxation revenue in a way that most other states reject as unfair?