Television changed the way candidates run for office, so finding a documentary about it should come as no surprise. This PBS site provides a timeline of political commercials, analyzing how television advertisements shaped the political process and providing some historic video clips.
Visitors can even try their hand at creating a political commercial.
This site limits its scope, if not the number of ads it offers. There's a quirky mix here - think Rainbow Brite alongside Gap Khakis. Categories include Super Bowl ads from 1998 and 1999, Academy Award ads, and classic toy and video game ads from the 1980s. There's also a Best of the Archive section, for those who just want to browse. All commercials are viewable with RealPlayer or QuickTime.