Final answer:
The De Lome Letter was received negatively by the American public, generating anti-Spanish sentiments and increasing tensions between the United States and Spain.
Step-by-step explanation:
The De Lome Letter, a personal correspondence between Spain's ambassador to the United States and a Spanish foreign minister in Cuba, was received negatively by the American public. The letter, which criticized President McKinley, was published by the yellow press, leading to outrage among the American public and generating anti-Spanish sentiments. The letter played a significant role in inciting public opinion and increasing tensions between the United States and Spain, ultimately leading to the Spanish-American War.