Eustace Moitt checks voting booths for supplies at a polling station in New York, on June 26, 2012. (Todd Heisler / The New York Times)

Claims of election rigging in the US are typically disparaged for lack of proof. But the nation has a history of vote manipulation and the current paperless electronic systems are especially conducive to undetectable insider fraud. It's time we established iron-clad systems for election oversight.