Donald Trump responded yet again in his ongoing feud with Fox News, tweeting Sunday he would not let up attacks against anchor and host Megyn Kelly.

The Kelly File is one of the highest rated prime time cable news shows. Fox News issued a statement last week blasting The Republican front runner for having a “sick obsession” with the Kelly File host.

“Donald Trump’s vitriolic attacks against Megyn Kelly and his extreme, sick obsession with her is beneath the dignity of a presidential candidate who wants to occupy the highest office in the land,” Fox News’ statement reads.

The presidential candidate has expressed disdain for Kelly since the early days of the campaign. The businessman took issue with a question Kelly asked during the first Fox News debate. The prime time star asked about statements Trump made in which he referred to women as “fat pigs” and “dogs.” In an interview later, Trump seemed to suggest Kelly asked the question because she was menstruating. “she had blood coming out of her eyes, he said. “Blood coming out of her wherever.”

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