Trump demands Puerto Ricans show gratitude for hurricane relief -- then attacks 'the incompetent Mayor of San Juan'

President Donald Trump on Wednesday once again bashed the island of Puerto Rico while demanding that its residents show the Federal Emergency Management Agency proper gratitude for helping them out.

"We are tracking closely tropical storm Dorian as it heads, as usual, to Puerto Rico," the president wrote. "FEMA and all others are ready, and will do a great job. When they do, let them know it, and give them a big Thank You - Not like last time. That includes from the incompetent Mayor of San Juan!"

The president earlier this week complained about having to spend more money helping out Puerto Rico and asked, "Will it ever end?"

Trump came under fire for his administration's sluggish response to Hurricane Maria after it struck Puerto Rico in 2017, and the president has regularly taken shots at the U.S. territory for needing financial assistance to recover from natural disasters.