Republican presidential frontrunner Donald Trump has clashed with two television reporters.
He revived his feud with the Fox News channel host Megyn Kelly – who returned to her show on Monday after a break – saying she must have had a bad holiday because “she’s really off her game”.
Fox News chief Roger Ailes has demanded an apology, describing the business mogul’s verbal attack as “disturbing”.
Separately, Mr Trump had a journalist ejected from a news conference.
Univision news anchor Jorge Ramos was trying to question Mr Trump about his call to deport 11 million undocumented immigrants from the US and build a wall the length of the Mexican border.
But Mr Trump insisted that he had not been invited to submit a question.
“You haven’t been called, go back to Univision,” Mr Trump said, before Mr Ramos was ejected from the news conference.
As security officers approached the Mexican-American journalist, he said: “I am a reporter. Don’t touch me. I have a right to ask the question.”
In an interview with CNN on Monday, Mr Ramos had accused Mr Trump of disseminating hate by calling for mass deportations of families in the US who do not have the right documentation.
Mr Trump’s clash with Ms Kelly comes two weeks after controversy over his remarks about her following the first Republican debate.
In a CNN interview, Mr Trump said the Fox presenter “had blood coming out of her eyes, blood coming out of her wherever” to describe the way she questioned him during the debate over comments he had made about women.
He was subsequently dropped as a speaker at a major US conservative forum, and his comment was denounced by rival Republican candidates.