This is the only episode in the series where the opening note of the theme song is held extra long as Josh makes his triumphant exit from the polling place.
When Donna (Janel Moloney) is outside the polling place trying to find a voter to switch ballots with, the opening shot shows a tall sky scraper in the background. No building of such a height exists in Washington, DC due to height restrictions on buildings there.
The time appears to be the same in California and Washington, D.C.
The Secretary of Agriculture is actually 9th in the line of succession to the Presidency.
The West End Library is an actual polling place for the District of Columbia - however the opening scene was not filmed in the library.