Yes, a U.S. President can resign from office voluntarily if they feel unable to fulfill their duties due to stress, frustration, or any other reason. Resignation by a sitting President is a rare occurrence in U.S. history, but it is legally permissible.
The process for a President's resignation is straightforward:
The President would typically submit a letter of resignation to the U.S. Secretary of State, officially announcing their intention to step down.
The Vice President, as the next in line of succession, would then assume the role of President immediately after the resignation takes effect.
One notable example of a President resigning from office is President Richard Nixon. Amid the Watergate scandal and facing potential impeachment, President Nixon announced his resignation on August 8, 1974. His resignation took effect the following day, and Vice President Gerald Ford was sworn in as the 38th President of the United States.
It's worth noting that the U.S. presidency is a highly demanding and stressful position, and Presidents often face immense pressure and challenges during their tenure. However, most Presidents serve their full term and find ways to cope with the stress and responsibilities of the office. In situations where a President's health or ability to perform their duties is severely compromised, there are constitutional provisions, such as the 25th Amendment, which allows for the Vice President and the Cabinet to remove a President from office if they are deemed unable to discharge their duties.