This was clarified on Snopes; he was referring to groups such as fundamentalist Christians who rarely vote, urging them to come out this one time and vote. Not very eloquently worded, perhaps, but certainly his intent, as explained by spokespeople and by himself in subsequent interviews, was not to shut down voting.
Anyone trying to make sense of Trump's words has as much credibility to me as people who interpret tea leaves, or the Bible. Judge his actions; trying to divine anything from his words is about as effective as chasing wild geese.
I judge every politician by their actions, not their words. In Trump's case, his words are more "salad-like" than most, but his actions generally speak pretty clearly.
