Final answer:
Woodrow Wilson was the president of the United States during the First World War.
Step-by-step explanation:
The president of the United States during the First World War was Woodrow Wilson. He served two terms as the president from 1913 to 1921 and played a crucial role in leading the country through the war. Wilson is known for his Fourteen Points, a set of principles he proposed as the basis for peace negotiations after the war.
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