Dick Richardson

At the time of Fallout 2 Dick Richardson was the president of the United States, which meant nothing more than that he led the survivors on the Enclave's oil rig. He was very willing to explain the Enclave's entire plan to the Chosen One

The destruction of the Enclave erased all trace of President Richardson from history. Now the title of "President" is used simply as a boogeyman used to frighten children.

President Richardson is a Talking Head voiced by Jeffrey Jones.

Notes: Despite that he is one of the shortest living NPC's in the entire game, he practically reveals all the background storyline questions regarding the Enclave, their reason behind digging up Mariposa Military Base, and their connection with the Vaults, as well as the reasons for the kidnapping of the Chosen One's fellow tribesmen.

He also holds the Presidential Access Keycard (which may only be obtained by killing him, though there are several ways this can be achieved without alerting the entire Enclave), which allows you to turn the turrets against their former master. This only works on the turrets in the Entrance hall.

Reference To Movie Clear And Present Danger
In the movie Clear And Present Danger the president of United States says a similar line near the end of the movie: "How dare you come and barge in to my office!" to the movie's main character Jack Ryan. In Clear And Present Danger the president was portrayed as a corrupt and power hungry politician.