Factual error: Whenever the king of Sweden is mentioned by name they always refer to him as "King Gustaf." The king of Sweden is actually named Carl XVI Gustaf. His given name is Carl Gustaf and he holds the throne as the sixteenth king Carl. Thus they should refer to him as "King Carl Gustaf" or, less common but technically correct, "King Carl." Since Bartlet has met the Swedish king in person and talked to him about Ellie's mathematical skills he ought to know the correct name.
The West Wing (1999)
1 factual error in show generally - chronological order
Starring: Martin Sheen, Allison Janney, Rob Lowe, Bradley Whitford, Stockard Channing, Richard Schiff, Dulé Hill, John Spencer, Janel Moloney, Joshua Malina
Genres: Drama
Faith Based Initiative - S6-E10
Other mistake: In the flashback episode where the early days of the first Bartlet campaign are shown, Toby is "teaching" C.J. the proper technique for passing a basketball, something she is not very good at. Yet in this episode, when C.J.'s sexuality is questioned in the news, her history as a star basketball player in high school and college is revealed.
C.J. Cregg: Is there anything I can say other than the President rode his bicycle into a tree?
Leo McGarry: He hopes never to do it again.
C.J. Cregg: Seriously, they're laughing pretty hard.
Leo McGarry: He rode his bicycle into a tree, C.J., what do you want me...? "The President, while riding his bicycle, came to a sudden arboreal stop."
Trivia: Martin Sheen's daughter, Renee, plays President Bartlet's assistant Nancy. Since she doesn't use her father's stage name, Nancy is credited by her birth name "Estevez."
More questions & answers from The West Wing
Answer: It's in reference to the many televangelists and revival ministers usually associated with the right-wing that have been convicted of tax fraud (Jim Bakker and Tamy Faye being a more famous set). Occasionally, the more unscrupulous ministers have bilked millions from believers all in the name of God.
Nikki