(Scott Olson/Getty Images)

Republican presidential candidate Carly Fiorina on Sunday lambasted GOP rival Donald Trump for mocking a reporter with a congenital joint condition during a rally in South Carolina last week, saying the real estate mogul “only feels big when he’s trying to make everyone else look small.”

“This is the pattern, isn’t it? The pattern is — he says something insulting, offensive and outrageous; the media pays attention; then he claims we all misunderstood him,” Fiorina said on “Fox News Sunday.” “This is the pattern, perhaps, of an entertainer. It’s certainly not the pattern of a leader.”

Trump faced intense scrutiny after he appeared to imitate New York Times reporter Serge Kovaleski's physical condition in front of thousands of supporters. The reporter has arthrogryposis, a condition that limits flexibility in his arms, which Trump’s hand movements closely mirrored.

[Trump: I won’t apologize to the New York Times for mocking its reporter — the paper ‘should give me an apology’]

Trump has denied that he was mocking Kovaleski, insisting that he was not sure whether he had ever met the reporter — a claim Kovaleski has strongly contested. In the wake of the controversy, Trump called on the New York Times to issue a personal apology for denouncing his actions.

"This reporter is so happy. Because people have heard of him now," Trump said Saturday at a rally in Florida. "Nobody ever heard of the guy."

He added later: "I don't mock people. I don't mock people. I don't mock people that have problems. I don't mock people that have problems, believe me."