California
California has a clear ban on photography and videography: “No person shall, with the intent of dissuading another person from voting, within 100 feet of a polling place, . . . [p]hotograph, videotape, or otherwise record a voter entering or exiting a polling place.” (Cal Elec Code § 18541.) It’s not clear whether this applies to the media.Only voters engaged in voting can stay within the “voting booth area.” (Cal Elec Code § 14221.)

Cal Elec Code § 18541: Prohibited activities within 100 feet of polling place; Punishment for violation. (a) No person shall, with the intent of dissuading another person from voting, within 100 feet of a polling place, do any of the following: (3) Photograph, videotape, or otherwise record a voter entering or exiting a polling place.

Cal Elec Code § 14221 (2006): Persons permitted within voting booth area. Only voters engaged in receiving, preparing, or depositing their ballots and persons authorized by the precinct board to keep order and enforce the law may be permitted to be within the voting booth area before the closing of the polls.Cal Elec Code § 14224 (2006): Occupation of voting booths or compartments. Voters shall not remain in or occupy the booths or compartments longer than is necessary to mark their ballots, which shall not exceed 10 minutes.
(With thanks to Jim Goldstein for linking to This page on the laws regarding photography at the polls.)