President Donald Trump lashed out at the mayor of San Juan and other officials in storm-ravaged Puerto Rico, contemptuous of their claims of a laggard U.S. response to the natural disaster that has imperiled the island's future."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," Trump said in a series of tweets a day after the capital city's mayor appealed for help "to save us from dying.""They want everything to be done for them when it should be a community effort," Trump wrote.