Final answer:
A president's popularity can be influenced by factors such as the economy, national security, and specific events during their term.
Step-by-step explanation:
A president's popularity can fluctuate due to various factors such as the economy, national security, and events that occur during their term. These factors can cause the public's approval of the president to increase or decrease over time. For example, if the economy is doing well, the president's popularity may increase. On the other hand, if the economy is struggling, it may lead to a decrease in popularity. Additionally, specific events like wars or terrorist attacks can also impact a president's popularity. After the 9/11 attacks, President George W. Bush's approval ratings significantly rose.