What did Chamberlain do? What is appeasement? And what happened to John McCain's arms? One of the little election year mini-dramas making the Internet rounds is of MSNBC's Chris Matthews' insistent questioning of talk show host Kevin James over the issue of appeasement. "What did Chamberlain do?" Matthews asks his Hardball guest repeatedly. Mr. James was unable to answer with historical specifics. As it happens, I've met Mr. Matthews, spending an afternoon with him several years ago at his MSNBC office in the company of a friend who was interviewing him for a profile in the Financial Times. The article...