US election fraud

Overview
There have been repeated claims in the past two United States Presidential elections (2004 and 2000) of vote-rigging via defective voting machines, mass deletions of registered voters, and other means.

In the 2000 US presidential election, George W. Bush was officially elected by a narrow margin (271/538, 50.3%). According to many claims, he would have been the clear loser had the votes been counted correctly.

There were also widespread allegations of fraud in the 2004 US elections, though it is less clear what the results should have been.

Elections

 * 2008: 2008 US elections, 2008 US presidential race
 * 2006: 2006 US elections: No known reports of fraud
 * 2004: 2004 US elections: Widespread fraud alleged, upshot unclear
 * 2000: 2000 US presidential election