The U.S. media grew increasingly unfavorable in its reporting on the situation in Nicaragua. Realizing that the Somoza dictatorship was unsustainable, the Carter administration attempted to force him to leave Nicaragua. Somoza refused and sought to maintain his power through the National Guard. At that point, the U.S. ambassador sent a cable to the White House saying it would be "ill-advised" to call off the bombing, because such an action would help the Sandinistas gain power. When ABC reporter Bill Stewart was executed by the National Guard, and graphic film of the killing was broadcast on American TV, the American public became more hostile to Somoza. In the end, President Carter refused Somoza further U.S. military aid, believing that the repressive nature of the government had led to popular support for the Sandinista uprising.