Still, Luntz said he doesn’t think the race is over.
He said there are enough people who are still undecided and noted Democratic presidential nominee Hillary Clinton is under 50 percent in many polls.
“But it requires a level of discipline that the Trump campaign has not had,” he said. “This is about the voice of the voters, not the voice of Donald Trump.
Luntz continued to criticize the Trump campaign.
He said he has never seen a campaign with “less discipline” or “less focus.”