Ben Carson said on Thursday that a number of people have talked to Donald Trump about his Twitter use and that the Republican frontrunner knows that it is a problem.

Carson made the comments in an interview with Florida radio host Joyce Kaufman. Referring to Trump’s Twitter account, the host told Trump’s former rival and current surrogate, “I hope that somebody closes that Twitter account, really.”

“Well, I think he will come to understand,” Carson said. “We talk about it, and a number of people have talked about it, including his family. And he knows that it’s a problem. And the first part of solving the problem is recognizing that it exists.”

Carson, who has made a number of eyebrow-raising comments since endorsing Trump, also said in the interview that a number of people were working to help Trump avoid becoming distracted by what he described as a hostile media.