15 St. Patrick's Day trivia questions to try while drinking a green beer
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Harry Truman
In 1952, Irish Ambassador John Hearne delivered a box of shamrocks to President Harry Truman. This gesture resulted in stronger bonds between the United States and Ireland, as well as helping make St. Patrick's Day a national event in the US.
Since 1952, Irish leaders have presented shamrocks to the President almost every year.