Former Trump adviser Carter Page and two of his companies, all citizens of Oklahoma, relied on diversity jurisdiction for a federal lawsuit in Chicago against the Democratic National Committee and its law firm, Perkins Coie LLP. Page claimed complete diversity under 28 U.S.C. Sec. 1332 because the defendants are citizens of other states. A district judge tossed the case, without considering whether Sec. 1332 applied, based on failure to establish that the defendants are subject to personal jurisdiction in Illinois. But 7th …