Answers

Whether voter fraud is a problem is debated — I'll survey the evidence on how often it occurs and what safeguards exist. In the U.S., voter fraud exists but all systematic reviews find it is very rare relative to the number of votes cast. What the data shows - There is no comprehensive government database of voter fraud - it is not a crime tracked comprehensively by government agencies, though

No, voter fraud is not a significant or systemic problem in US elections. It occurs in isolated instances, is illegal, and is prosecuted when detected, but extensive data from multiple sources shows it is exceedingly rare—far too infrequent to affect election outcomes at scale. Rates are typically measured in fractions of a percent (often 0.0001% or lower), making it rarer than many everyday risks