Remember Capron v. Van Noordan, 6 U.S. (2 Cranch) 126 (1804)?
How about Strawbridge v. Curtiss, 7 U.S. (3 Cranch) 267 (1806)?
From your civil procedure class? In law school? Nothin'?
Well, even if you don't, we may all take comfort in the fact that the D.C. Circuit does. Indeed, the holdings in