When CNN's Wolf Blitzer asked if Lewandowski would stay with the campaign even if he was convicted of a misdemeanor for allegedly roughing up a reporter, Pierson replied "yes" without hesitation.
"Yes, absolutely. Mr. Lewandowski is an integral part of the team, the camp wholeheartedly supports him and will see him through the ordeal," she said.
Pierson also vowed that Lewandowski would "beat this" in court.
"Corey Lewandowski is going to beat this," Pierson said. "He will plead not guilty and we will have to let the process play out."
Pierson used the same unfortunate turn of the phrase later on in the interview.
"This is absurd, it's ridiculous and it will be beat," she said.
Lewandowski is scheduled to appear in court on May 4.