Amy Gardner, in the middle of her diatribe against Josh, says to him, "Those pajamas are too big for you." In this scene, Josh is wearing the set of pajamas C.J. got him in S2:E3 "The Midterms" while he was still recovering from being shot. In that episode, C.J. also noted how big the pajamas were on Josh, who responded, C.J. "All this time I've been working with you, did you also think I was playing power forward for the Cleveland Cavaliers?"
On the westbound flight to Iowa, the pilot announced they were heading to their cruising altitude of 41,000 feet. On the return (eastbound) flight, he announced a cruising altitude of 37,000 feet. Planes travelling west are assigned even-numbered altitudes (to the nearest thousand feet), while planes heading east are assigned odd-numbered altitudes. The acronym is WEEO - West Even, East Odd.
Donna (Janel Moloney) is worried about having to do jury duty, but the biggest problem is that she's going to have difficulty reporting for it. In Election Night (2002) Donna votes by absentee ballot because her place of residency is still in Wisconsin. When called for jury duty, it is to a local court as decided by your residency. If she needs to report 'tomorrow,' she's not assisting Josh (Bradley Whitford) the next day, she's in Wisconsin.
Leo (John Spencer) makes reference to the USS Thurmont battle group. The official name of Camp David is "NSF Thurmont", which they use as the name of a season 6 episode.
The University of Iowa is in Iowa City, which neighbours Cedar Rapids, where Air Force One landed.