The President first appeared in Sonic Adventure 2, when Sonic the Hedgehog and Miles "Tails" Prower catch up to his limousine on Central City's Route 101 in order to use his computer to pinpoint the location of Dr. Eggman, as the doctor had contacted the President seconds earlier supplying an ultimatum: that he either let Eggman take over the country, or he'll use the Eclipse Cannon to wipe out every single major city in the United Federations, and planned on giving him 24 hours to decide, although Sonic's arrival forced him to abandon the ultimatum.
Shadow the Hedgehog
The president makes his next major appearance in Shadow the Hedgehog, where he holds an admiration for Sonic and Shadow for saving the world in Sonic Adventure 2 (he also has a picture of the two heroes posing in front of the White House), and appears in several cutscenes trying to deal with the alien invasion of the Black Arms. Also, his design is slightly altered in this game as he now bears a striking resemblance to Government Agent Kent Mansley, the main antagonist from the animated film The Iron Giant. In the game's Last Story and true ending, he is seen at the Guardian Units of Nations Headquarters where he and the rest of the people at the base see a recording of Professor Gerald Robotnik. The recording gave Shadow the motivation he needed to save the world once more by vanquishing Black Doom and eliminating the Black Arms for good by destroying the Black Comet with the Eclipse Cannon. The President realizes that the Professor truly was a hero and helped save the entire human race, he then vows to make a brighter future, paying homage to Gerald which the G.U.N. Commander calls an excellent idea.
In Sonic X, a different President is seen, taking the place of the President seen in the games during the animated adaptations of Sonic Adventure and Sonic Adventure 2.
According to the President's statement in Shadow the Hedgehog, on Expert Mode in the levels Air Fleet and Black Comet, the President appears to have rather odd national events with other nations such as karaoke with the minister of Finance and tea time with the Chief Private Secretary of Japan.