Final answer:
Woodrow Wilson was the president at the start of World War I.
Step-by-step explanation:
Woodrow Wilson was the president at the start of World War I. He served as the 28th President of the United States from 1913 to 1921. It was during his presidency that the United States entered World War I in 1917 after remaining neutral for the first few years of the conflict.
Learn more about presidents during World War I