http://www.foxnews.com/politics/2009/06/18/sen-boxer-chides-brigadier-general-calling-maam/
Brig. Gen. Michael Walsh, with the U.S. Army Corps of Engineers, was testifying on the Louisiana coastal restoration process in the wake of Hurricane Katrina. He began to answer one of Boxer's questions with "ma'am" when Boxer immediately cut him off.
"You know, do me a favor," an irritated Boxer said. "Could say 'senator' instead of 'ma'am?'" "Yes, ma'am," Walsh interjected.
"It's just a thing, I worked so hard to get that title, so I'd appreciate it, yes, thank you," she said.