How is it THIS is the slur that broke Limbaugh's back?

[KansDem]

7. Could this be Rush's "Have you no sense of decency" moment?

http://www.americanrhetoric.com/speeches/welch-mccarthy.html

Also--

The most famous incident in the hearings was an exchange between McCarthy and the army's chief legal representative, Joseph Nye Welch. On June 9, the 30th day of the hearings, Welch challenged Roy Cohn to provide U.S. Attorney General Herbert Brownell, Jr. with McCarthy's list of 130 Communists or subversives in defense plants "before the sun goes down". McCarthy stepped in and said that if Welch was so concerned about persons aiding the Communist Party, he should check on a man in his Boston law office named Fred Fisher, who had once belonged to the National Lawyers Guild, which Brownell had called "the legal mouthpiece of the Communist Party".[82] In an impassioned defense of Fisher that some have suggested he had prepared in advance and had hoped not to have to make,[83] Welch responded, "Until this moment, Senator, I think I never really gauged your cruelty or your recklessness ..." When McCarthy resumed his attack, Welch interrupted him: "Let us not assassinate this lad further, Senator. You've done enough. Have you no sense of decency, sir, at long last? Have you left no sense of decency?" When McCarthy once again persisted, Welch cut him off and demanded the chairman "call the next witness". At that point, the gallery erupted in applause and a recess was called.

http://en.wikipedia.org/wiki/Joseph_McCarthy#Public_opinion

Public opinion
McCarthy's Support in Gallup Polls
Date Favorable No Opinion Unfavorable Net Favorable
1951 August 15 63 22 −7
1953 April 19 59 22 −3
1953 June 35 35 30 +5
1953 August 34 24 42 −8
1954 January 50 21 29 +21
1954 March 46 18 36 +10
1954 April 38 16 46 −8
1954 May 35 16 49 −14
1954 June 34 21 45 −11
1954 August 36 13 51 −15
1954 November 35 19 46 −11