(CNN) A new press aide on Sen. Bernie Sanders' presidential campaign has apologized for comments online questioning whether American Jews held a "dual allegiance" with Israel.

"In a conversation on Facebook, I used some language that I see now was insensitive," Belén Sisa, Sanders' incoming deputy press secretary for Latino outreach, said in a statement. "Issues of allegiance and loyalty to one's country come with painful history. At a time when so many communities in our country feel under attack by the president and his allies, I absolutely recognize that we need to address these issues with greater care and sensitivity to their historical resonance, and I'm committed to doing that in the future."

As first reported by Politico late Tuesday, Sisa, in the course of a Facebook exchange over Minnesota Rep. Ilhan Omar's controversial recent remarks, asked another commenter, "Do you not think that the American government and American Jewish community has a dual allegiance to the state of Israel? I'm asking not to rule out the history of this issue, but in the context in which this was said by Ilhan."

Sisa deleted the comment after she was first approached by a Politico reporter, according to that outlet.

Speaking on a panel last month in Washington, Omar, a Democrat, discussed the backlash to her use of what many have described as anti-Semitic tropes in her criticism of Israel and some pro-Israel American lobbyists.

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