Note the size of Cam Brady's (Will Ferrell's) U.S. Flag lapel pin. As he begins to flounder in the polls, the flag grows until it is at least four to five times larger than the original.
Zach Galifianakis based the character of Marty Huggins on his fictitious twin brother "Seth Galifianakis", which he created and first performed in his DVD special Zach Galifianakis: Live at the Purple Onion (2006).
A scene where Brady (Will Ferrell) appeared on Piers Morgan Live (2011), where it is revealed he was backed by a tobacco company appearing in many trailers. The scene was cut from theatrical release, but returns for the extended uncut release.
The exterior shot of the Motch Mansion is the same used as Wayne Manor in the television series Batman (1966).
Though not directly referenced, the Motch brothers are based on the real-life Koch brothers. David H. Koch and Charles G. Koch are major contributors to conservative policy and advocacy groups in the U.S.