These were the opening lines of cross-examination before the House Un-American Activities Committee in the 1950's. At this time, the US government was terrified of communists, and hundreds of people were investigated by this committee which was headed by Senator Joseph McCarthy. I suppose it does now carry a hint of sarcasm - well spotted.
New words, one handy idiom, and a 2-minute quiz — delivered to your inbox to keep your streak alive.