Because she omitted a simple phrase ("...while he was running in a primary as late as June in 1964") it seriously skewed what she was talking about, and a first blush sounded completely non-sequitur and off-the-wall. But, it wasn't all that serious a gaffe. She was trying to state an historical precedent, and she muffed it verbally, but it's no BFD. She's nowhere near as loopy as it may have sounded at first.