India, June 30 -- United States President Donald Trump on Sunday issued a warning to New York City mayoral candidate Zohran Mamdani, asking him to "behave" himself.

In an interview with Fox News, Trump said that whoever becomes the mayor of New York will "have to behave themselves," warning that the federal government would be "coming down very tough on them financially" if they didn't.

Donald Trump went on to describe Mamdani as a "pure communist," adding that his election would be "very bad" for New York.

Calling Mamdani's potential victory "inconceivable," the US President added, "if he does win, he's going to have to do the right thing."

"Let's say this, if he does get in, I'm going to be President and he's going to have to do the...