U.S. Army Brigadier General Michael Walsh "learned his lesson the hard way" by crossing a very testy Sen. Barbara Boxer (D-Calif.) in testimony before a Senate committee yesterday, according to MSNBC's Chris Matthews. [audio available here]

Walsh's grave transgression: calling the senator, "ma'am." For that, the "Hardball" host treated Walsh as part of the day's "political sideshow," literally, in his June 18 program:

Sen. BARBARA BOXER: Do me a favor. Could you say, "Senator," instead of "Ma'am"? It's just a thing. I worked so hard to get that title. So I'd appreciate it. Yes, thank you. 

Brig. Gen. WALSH: Yes, Senator.

CHRIS MATTHEWS: She sure did, she's been elected three times, by the way. So I guess the question is this: Had he said "sir" to a male senator, would that senator be correct in correcting the general? There is a history, however, and let us not forget, of male-female condescension in the U.S. Senate. Just recall the Anita Hill testimony of not too long ago.