(Reuters) -Pete Marocco, the Trump administration official who played a major role in dismantling the U.S. Agency for International Development, has left the State Department, a U.S. official said on Sunday. President Donald Trump's administration has moved to fire nearly all USAID staff, as billionaire Elon Musk’s Department of Government Efficiency has slashed funding and dismissed contractors across the federal bureaucracy in what it calls an attack on wasteful spending.