Donald Trump has launched an attack on the mayor of the Puerto Ricon capital, accusing her of "poor leadership" a week after the country was hit by a category 4 storm.
Tweeting from a golf course in New Jersey, the President claimed San Juan mayor Yulin Cruz had been told by the Democrats to be "nasty" to him, before accusing her of "poor leadership ability".
"The Mayor of San Juan, who was very complimentary only a few days ago, has now been told by the Democrats that you must be nasty to Trump," he wrote.
"Such poor leadership ability by the Mayor of San Juan, and others in Puerto Rico, who are not able to get their workers to help.
"They want everything to be done for them when it should be a community effort. 10,000 Federal workers now on Island doing a fantastic job."
Mr Trump has defended his administration's response to the recent hurricane in Puerto Rico by explaining that the island is “surrounded by water”.
He added that local governments had been “totally and unfortunately unable to handle this catastrophic crisis on their own – just totally unable to.”
Just days ago, Ms Cruz broke down in an interview as she described the humanitarian crisis on the island, saying: “People are starting to die.”
Hurricane Maria struck Puerto Rico last week, killing at least 16 people and knocking out 80 per cent of the island’s electricity.
Almost all of the island's 3.4m residents remain without power, with even hospitals relying on generators to keep the lights on.