The New York State Republican Party is launching an ad campaign urging Jewish voters to join the GOP — while accusing Democrats including Mayor Zohran Mamdani of promoting or condoning antisemitism. The ad — appearing in Jewish publications and Jewish-concentrated social media — contains an open letter from State GOP Chairman Ed Cox addressed “To Our Jewish Neighbors and Fellow New Yorkers.” “The New York State Republican Party stands with you. Unequivocally,” Cox wrote in the letter. An ad — appearing in Jewish publications and Jewish-concentrated social media — contains an open letter from State GOP Chairman Ed Cox (above)...