In the first act, before any ballots have been taken at the convention, and before Baker declines Russell's VP offer and throws his own hat into the ring for President, a TV news channel can be seen behind Santos with this text: "Who will be the Democratic nominee? Baker gains momentum before third ballot".
During several shots from the floor of the convention, there are clearly many rows of empty seats in the background, even though the entire hall is supposed to be completely full.
In the introduction before Congressman Matt Santos takes the stage to address the convention, the announcer states that Santos is a graduate of the US Air Force Academy (at around 50 mins). In previous episodes he is described as a graduate of the US Naval Academy and in the top 10 percent of his class; in later episodes he is said to be a graduate of the Naval Academy, an officer in the US Marine Corps, and a pilot who served in the Gulf. The single reference to the Air Force Academy is inconsistent with the other references.