Donald Trump campaign spokeswoman Katrina Pierson pushed rumors about Hillary Clinton being in poor health, claiming she has dysphasia.

Appearing on MSNBC, Pierson told host Kirsten Welker that Clinton has the ailment caused by brain damage that affects communication and speech, citing her "mannerisms" and a concussion she suffered in 2012 while secretary of state.

"Yes. [Trump] has said that she does not have the strength or the stamina for a very long time. That's nothing new," Pierson told the host. "What's new are the other reports of the observations of Hillary Clinton's behavior and mannerisms, specifically with what you just showed in those previous clips, as well as her dysphasia, the fact that she's fallen. She has had a concussion..."

"These health questions have been debunked, Katrina," Welker told Pierson, cutting her off. "And yet Donald Trump continues to try to stir them up. Is that responsible for somebody that's running for president?"

"Well, he's not talking about her health record. He's talking about specific observations," Pierson responded. "It's something that needs to be addressed. She's taken a lot of time off the campaign trail. She hasn't had a press conference this year. Why don't we just have Mrs. Clinton have a press conference and she can answer all of these questions.

The Clinton campaign has laughed off the talk about the former secretary's health, citing a statement from her doctor, which says that she is in "excellent health" and is "fit" to serve as president if elected.