What was the de lome letter

The De Lome Letter was a diplomatic incident. It was written by the Spanish Prime minister of Cuba in which he described McKinely as a "weak and feeble president".

De Lôme Letter (1898) ... The de Lôme letter, a note written by Señor Don Enrigue Dupuy de Lôme, the Spanish Ambassador to the United States, to Don José Canelejas, the Foreign Minister of Spain, reveals de Lôme's opinion about the Spanish involvement in Cuba and President McKinley's diplomacy.