How accurate are claims that the US election is rigged?

Encyclopedia of Opinion

Question: How accurate are claims that the US election is rigged?
Position‹2 of 3›: Claims that the US election is rigged are only partially accurate

This position holds that claims the US election is rigged are only partially accurate. It argues that electoral and postal ballot fraud do occur, but only in isolated, infrequent instances—nowhere near the scale that would be needed to alter a national result.

Supporting arguments · 2

Postal ballot fraud incidences do exist, but are isolated
Claims that the US election is rigged are only partially accurate. There are rare occasions in which postal ballot fraud incidences do occur. These events are isolated and do not occur frequently in the US.
Electoral fraud happens on a small basis
Claims that the US election is rigged are only partially accurate. Electoral fraud happens occasionally, but the incidences of it are highly isolated and rare.