Cellphones do not work in the West Wing of the White House: they are jammed for security reasons.
Marines aren't called "soldiers," and a Marine would never refer to himself as such, just as a soldier wouldn't call himself a Marine.
Marines do not wear cover (caps or hats) when indoors.
Cyrus Beene wears a flag pin on his right lapel. US Flag Code says the pins should be worn over the heart, which is exhibited correctly by many American politicians. In subsequent episodes, Cyrus' pin is on the correct lapel.