What is or what is not a federal question under Grable & Sons Metal Products, Inc. v. Darue Engineering & Manufacturing , 545 U.S. 308 (2005) [ enhanced opinion available to lexis.com subscribers ], is an issue that continues to perplex lawyers, judges, and law students alike. In Hartland Lakeside Joint No. 3 School District v. WEA Insurance Corp., No. 13-3787 (7th Cir. June 27, 2014) [ enhanced opinion ], the...