She certainly was someone who believed in speaking truth to power:
Eartha Kitt versus the LBJs by Frank James
Say what you will about Eartha Kitt, the American original of a performer who died at 81 on Christmas Day, she certainly knew how to disrupt a White House event.
One of the best Kitt stories ever has to be how she gave First Lady Lady Bird Johnson the blues in 1968. A petite woman, Kitt had an out-sized ego and just as sizable chip on her shoulder, the latter the result of an unhappy childhood she often talked of (a biracial child born out of wedlock in 1927 small-town South Carolina. You get the picture.)
The White House story was captured by David Murphy in a biography of Mrs. Johnson called "Texas Bluebonnet: Lady Bird Johnson."
As the president was contemplating his future, Lady Bird went on with her official duties and hosted a Women Doers lunch on Jan. 18, 1968 that was to focus on crime. Singer and actress Eartha Kitt was invited upon the recommendation of Sharon Francis and Liz Carpenter since Kitt had testified to Congress in favor of the President's anti-crime legislation. When President Johnson entered the room, Kitt confronted him, "Mr. President, what do you do about delinquent parents, those who have to work and are too busy to look after their children?" He told her that Social Security legislation was just passed that provided millions of dollars for daycare centers. Kitt was not pleased but Johnson told her those were issues for the women to discuss at the lunch.
During the question period, Kitt stood up and confronted Lady Bird, "Boys I know across the nation feel it doesn't pay to be a good guy." She moved into (sic) closer to the First Lady and said that boys don't want to behave for fear of being sent to Vietnam saying, "You are a mother too though you have had daughters and not sons. I am a mother and I know the feeling of having a baby come out of my guts. I have a baby and then you send him off to war. No wonder the kids rebel and take pot. And Mrs. Johnson, in case you don't understand the lingo, that's marijuana.
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http://www.swamppolitics.com/news/politics/blog/2008/12/eartha_kitts_versus_the_lbjs.html