Hillary Clinton’s “basket of deplorables” smear is a crucial political mistake says Frank Luntz, a GOP consultant long used by the establishment to pick words and messages that promote particular policies and candidates.

“You know, to just be grossly generalist, you could put half of Trump’s supporters into what I call the basket of deplorables … the racist, sexist, homophobic, xenophobic, Islamophobic, you name it,” Clinton said.

Shortly after Clinton’s comments flashed through social media, Luntz began posting a series of tweets criticizing her.

Hillary Clinton just insulted millions of hard-working Americans simply because they don't want to vote for her.https://t.co/utnuAkvdcJ — Frank Luntz (@FrankLuntz) September 10, 2016

Tonight, Hillary Clinton just had her "47 percent" moment. Expect poll numbers to get even tighter after this one. #Deplorables — Frank Luntz (@FrankLuntz) September 10, 2016

If Trump continues his upward climb in polls and wins on November 8th, tonight will be seen as the turning point of the race. #Deplorables — Frank Luntz (@FrankLuntz) September 10, 2016

The latter is only “truth” to people already voting for Hillary. It will turn off crucial undecideds. #Deplorables https://t.co/FkjcMhExlh — Frank Luntz (@FrankLuntz) September 10, 2016

Obama's director of rapid response calls it a "tone-deaf statement divorced from reality."#BasketOfDeplorables https://t.co/ZX3yeWsqvv — Frank Luntz (@FrankLuntz) September 10, 2016