What is a significant impact of presidential pardons?

Presidential pardons can lead to public backlash because they often involve controversial decisions that may appear to undermine justice or accountability. When a president pardons an individual, especially if that person is perceived to have committed serious crimes or if the pardon seems politically motivated, public reaction can be intense. Critics may argue that such actions evade the judicial process and give the impression of favoritism or corruption. Historical examples, such as the pardons granted by President Gerald Ford to Richard Nixon following the Watergate scandal, illustrate how pardons can provoke significant public debate and dissent, highlighting the president's power to influence justice and the mixed reactions from society.

In contrast, it is not accurate to say that pardons are never challenged in court, as there can be legal questions regarding the scope and limits of presidential powers; nor do they require congressional approval, making that option incorrect. Additionally, pardons are not considered reversible, as they are intended to be final, which further clarifies why it's significant that they can stir public opinion.