More than two months after Mr. Trump was sworn in as president, the Islamic State’s spokesman on Tuesday released the group’s first official statement on him, in an audio recording calling him an “idiot” and deriding his attacks on Muslims, among other claims.

Even then, Mr. Trump was only indirectly insulted rather than called out by name.

“America, you have drowned and there is no savior; you have become prey for the soldiers of the caliphate in every part of the Earth; you are bankrupt, and the signs of your demise are evident to every eye,” the spokesman said, according to a translation by Reuters. “There is no more evidence than the fact that you are being run by an idiot who does not know what Syria or Iraq or Islam is.”