Answer: If I were Donald I would read Harry Truman's autobiography because autobiographies are considered primary sources when looking for information. There is also plenty of information on the internet. This presidential election is considered one upset victory because most of the polls and media thought that the Republican candidate Thomas E. Dewey was going to be the winner. After the election, Truman appeared smiling in front of many people holding the Chicago Daily Tribune with a headline that said "Dewey defeats Truman".
Explanation: Primary sources give a first-hand of an event or time period and are cosidered authoritative in terms of giving a real picture of the real facts or events.