Washington, Nov. 6 -- US President Donald Trump has reacted to New York City mayor-elect Zohran Mamdani's victory speech, saying the 34-year-old Democrat should build a new understanding with Washington or risk facing setbacks.

Responding to a Fox News reporter's question, Trump appeared to soften his tone, stating that he wanted Mamdani "to do well" as he "loved New York," but repeated his earlier remarks calling the mayor-elect a "communist."

"You know, I'm so torn because I would like to see the new mayor do well because I love New York. I really love New York. When I left New York for Washington, New York was doing really well. But there were some bad signs. The bad sign was a guy named Bill de Blasio. So the signs of de Blasio, tha...