risdiction, bears the burden of demonstrating that the requirements for diversity are met. See Pollution Control Indus, of America, Inc. v. Van Gundy, 21 F.3d 152, 155 (7th Cir.1994). Specifically, Mr. Smart must establish “complete diversity,” “meaning that no plaintiff may be from the same state as any defendant.” Hart v. FedEx Ground Package Sys., Inc., 457 F.3d 675, 676 (7th Cir.2006); McCready v. eBay, Inc., 453 F.3d 882, 891 (7th Cir.2006). However, neither Mr. Smart’s complaint in the district court nor his brief to this court suggests that this requirement has been met. Quite the contrary, Mr. Smart, an Illinois citizen, asserts that one of the defendants is an Illinois law firm, which likely has partners who are Illinois citizens. See Cosgrove v. Bartolotta, 150 F.3d 729, 731 (7th Cir.1998) (“The citizenship of a partnership is the citizenship of the partners, even if they are limited partners, so that if even one of the partners (general or limited) is a citizen of the same state as the plaintiff, the suit cannot be maintained as a diversity suit.” (citing Carden v. Arkoma Assocs., 494 U.S. 185, 110 S.Ct. 1015, 108 L.Ed.2d 157 (1990))).
2.
If we are to maintain jurisdiction over this appeal, Mr. Smart’s complaint must raise a federal question. “Ordinarily, a court must determine the presence or absence of a federal question by examining only the plaintiffs well-pleaded complaint,” Nelson v. Stewart, 422 F.3d 463, 466 (7th Cir.2005) (citing Caterpillar Inc. v. Williams, 482 U.S. 386, 392, 107 S.Ct. 2425, 96 L.Ed.2d 318 (1987)); a federal defense to a state cause of action typically will not suffice, see Louisville & Nashville R. R. Co. v. Mottley, 211 U.S. 149, 152, 29 S. Ct. 42, 53 L.Ed. 126 (1908). This rule is followed even if the defense relies on “the pre-emptive effect of a federal statute.” Beneficial Nat'l Bank v. Anderson, 539 U.S. 1, 123 S.Ct. 2058, 156 L.Ed.2d 1 (2003) (citing Franchise Tax Bd. of California v. Constr. Laborers Trust for S. Cal, 463 U.S. 1,103 S.Ct. 2841, 77 L.Ed.2d 420 (1983)).
At first blush, it does not appear that Mr. Smart has met this requirement; he included only state causes of action in his complaint. Although the IBEW raised a federal defense to Mr. Smart’s claims — the preemptive force of the NLRA — federal preemption ordinarily does not provide a basis for asserting federal jurisdiction over a claim.
There is, however, an exception to this general rule:
“On occasion, the Court has concluded that the preemptive force of a statute is so ‘extraordinary’ that it ‘converts an ordinary state common-law complaint into one stating a federal claim for purposes of the well-pleaded complaint rule.’ ” Caterpillar Inc., 482 U.S. at 393, 107 S.Ct. 2425 (quoting Metro. Life Ins. Co. v. Taylor, 481 U.S. 58, 65, 107 S.Ct. 1542, 95 L.Ed.2d 55 (1987)). This “independent corollary” to the well-pleaded complaint rule is known as the “complete preemption” doctrine. Id. “Once an area of state law has been completely pre-empted, any claim purportedly based on that pre-empted state law is considered, from its inception, a federal claim, and therefore arises under federal law.” Id....
Nelson, 422 F.3d at 466-67 (parallel citations omitted). Complete preemption is a term that describes “the specific situation in which a federal law not only preempts a state law to some degree but also substitutes a federal cause of action for the state cause of action, thereby manifesting Congress’s intent” to extend the jurisdiction of the federal courts to such cases. Schmel