Yes, she was obviously trying to exaggerate the extent to which the racist red-neck demographic made up Trump's supporter base in order to taint those considering voting for him by association.
It massively, massively back-fired, but this was at a time where all of us - you and I included - felt that the Trump brand was too toxic for him to be elected. And all she was trying to do was capitalise on that same instinct by dialling up the "you can't vote for him - lots of his supporters are bigots" sentiment.