(CNN) There's little love lost between Ted Cruz and New York City.

On Friday, the feud between the Texas senator and America's largest city escalated when the New York Daily News told Cruz, in bold, headline font on the front page of the paper: "Drop dead, Ted."

Though Trump and Cruz have been jabbing each other on several issues for days, the Texas senator launched the first volley on this line of attack when he criticized Donald Trump for embodying "New York values" in an interview on a New Hampshire radio show. He repeated the attack throughout the week on Fox News and on the stage of the sixth Republican presidential debate Thursday night hosted by the Fox Business Network.

During Thursday night's debate, Trump delivered a withering rebuke to Cruz's attack, praising New York City's resilience after 9/11.

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