Election Statistics 
Provides federal biennial election data from 1920 to 2002, which can be viewed in pdf format. Data for the last six federal elections are also available as HTML files. Each file contains vote counts from every state and territory in the US for congressional and presidential elections. 

Elections
Links to information on the 2004 campaign, previous elections, campaign finance, etc.

georgewbush.com

Politics.com
Provides information on current presidential candidates, contributions to their campaigns, and poll results. 

Project Vote Smart 
Tracks the performance of over 13,000 political leaders.