"We regret its publication," the note added.

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In a lengthier statement Saturday afternoon, TNR's editor-in-chief Win McCormack extended the magazine's "sincerest apologies" to the mayor, adding that the piece was "inappropriate and offensive."

"We have high standards at The New Republic, but sometimes we fall short," McCormack added in the statement released through Twitter.

"Yesterday we made a mistake, but we remain committed to honoring the tradition of high standards and journalistic integrity that have been the hallmark of The New Republic for more than 100 years," he continued.

A statement from The New Republic’s editor in chief, Win McCormack: pic.twitter.com/yr07M0Ajdo — The New Republic (@newrepublic) July 13, 2019

The op-ed, which drew widespread rebuke on social media, referred to the openly gay mayor as "Mary Pete" and speculated about his life as a teenager struggling with his sexuality.

In a previous statement to CNN's Brian Stelter, the magazine explained that the op-ed "crossed a line."