19:48 GMT
Grace Eliza Goodwin in New York and Kwasi Gyamfi Asiedu in Washington
Image source, Getty ImagesTrump has sought to paint Mamdani as an extremist and a danger to the US.
The president has labelled the New York Democratic mayoral candidate – who calls himself a democratic socialist – a “100% Communist Lunatic” and accused the naturalised US citizen of being the in the country illegally. He has also threated to cut NYC’s federal funding if Mamdani wins.
On Tuesday morning, Trump posted on his Truth Social platform: “Any Jewish person that votes for Zohran Mamdani, a proven and self professed JEW HATER, is a stupid person!!!”
Last month, Trump said Mamdani “hates Jewish people and yet he’s got Jewish people supporting him”.
Some Jewish New Yorkers have taken issues with Mamdani’s highly critical stance against Israel’s war in Gaza.
The American Jewish Committee says it is “deeply troubled” by Mamdani’s “continued use of problematic rhetoric as it relates to Israel and Jews”.
But Mamdani, a Muslim, has also received support from several mostly progressive Jewish groups, reflecting division within the community on his candidacy.
Trump’s post “is showing once again that he doesn’t care about Jewish people,” Jamie Beran, CEO of progressive national Jewish organisation Bend the Arc tells the BBC in a statement.
Both Trump and former New York Governor Andrew Cuomo “use smokescreen antisemitism to manipulate Jewish fears for their personal gain”, he says, adding they will both be “defeated by Jews organising arm-in-arm with our neighbours to elect progressive champions like Zohran Mamdani.”
Mamdani has called out antisemitism as a major issue in New York, telling talk show host Stephen Colbert that it is “something we have to tackle”. Separately, he has promised an 800% funding increase for hate crime prevention.