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She not only appears to say LBJ did more than Kennedy, but also that LBJ succeeded where JFK failed. She is comparing Obama to Kennedy, if you follow her logic, and saying Obama will not be as effective, like JFK was not as effective, that she is the true Washington power broker like LBJ.
Doesn't seem like a good campaign strategy, comparing your opponent to JFK, and inspiring orator, a young articulate telegenic candidate and an inspiring president. Yeah, his accomplishments might have been meager, but getting killed just as he had laid the groudwork for civil rights laws might have had something to do with it. Anyway, not too bright an idea to compare Obama to the still-beloved JFK, unless you are trying to help him get elected.
The more she tries to make her case by criticizing her opponent, the more she screws up. Hil's momentum will be short-lived. Make way for the new guy.