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.
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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
Election Day (Part 1) - S7-E16
Continuity mistake: When Bruno and Bob are poring over exit polls, they mention that Santos seems to be leading in North Dakota, and comment that it is a state that hasn't gone Democratic in forty years. While that is true in the real world, in the fictional West Wing world, it is stated in Season 4 that Bartlet won the Dakotas in his landslide reelection.
President Josiah Bartlet: What's next?
Trivia: The theme tune heard for the show "Capital Beat" is actually the theme music for the UK's "News at Ten" on ITV.
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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