Up until that time, Donald Trump was a controversial figure and former President of the United States. I do not have access to his current emotions or personal life.
If there were any reasons for Donald Trump's emotions, whether happy or unhappy, they would be based on his individual experiences, circumstances, and personal feelings, which are private and subject to change over time. Speculating on the emotions of a specific individual without reliable information is not appropriate or accurate.
It's essential to respect the privacy of individuals and avoid making assumptions about their emotions without proper context. If you have any other questions or need information on a different topic, feel free to ask!