Before Santos' speech, Josh says, "Matt, take the pledge." The closed captioning says, "Matt, take the oath."
There is a train wreck news story on TV in the background of this episode (appears in all 3 candidates experiences). Strangely, the day the episode first aired, a suicidal man caused the worst train wreck in a decade.
In this episode, there is a scene where Josh and Donna are checking into their hotel rooms. In the scene, Josh is having trouble opening his door using his key card so Donna comes over and helps him with it. This scene is reminiscent of a previous episode "20 Hours in L.A." where the same thing happens except at that time they were still working together and they had adjoining rooms.
Neither the crime of adultery nor the death penalty exists in Turkey. It is ironic that the U.S. is one of the few countries whose federal government (as well as most of the states) still allows the death penalty.
Russell (on making ethanol from corn): It takes more oil to transport it and fertilize it than we save using it.
Will: Sir, you're not considering changing the speech?
Russell: Don't worry, I'm not suicidal. I'm going to take the pledge.
In "20 Hours in L.A.", Bartlet tells Hoynes that he admired the way Hoynes had hung in on the issue of ethanol tax credit in Iowa 2 years earlier and that Bartlet agreed with him on the issue but Hoynes was the only one to say it. This closely echoes the premise of "King Corn".
Music at the beginning of the episode is "Walkin' After Midnight" by Patsy Cline, available on her "Greatest Hits" CD, and "Green, Green Grass of Home" by Johnny Cash from his "At Folsom Prison" CD.
Alan Alda appears to be credited as part of the main cast, appearing in the opening montage of this episode, even though he is absent from the opening credits of subsequent episodes.
Music: The song played at the end of the episode is "Desire" by Ryan Adams, from his "Demolition" CD.
Martin Sheen, Allison Janney, John Spencer, Dule Hill, Stockard Channing, and Mary McCormack do not appear in this episode. Richard Schiff appears only briefly, seen on TV issuing a statement from the White House.
Senator Arnold Vinick: "I could take these people to a DMZ, it wouldn't take their minds off ethanol and abortion."
The reference to the DMZ (De-Militarized Zone) in Korea is possibly a reference to Alan Alda's role as Hawkeye Pierce in M*A*S*H, which was set during the Korean War.