Again, there may be opportunity for voter fraud, but despite this, there is remarkably little evidence or even specific allegations of voter fraud within the US

Again, there may be opportunity for voter fraud, but despite this, there is remarkably little evidence or even specific allegations of voter fraud within the US. I think it's also important to distinguish voter fraud, which is perpetrated by individuals and is, by nature, limited to a few dozen extra or lost votes, and is typically only a handful of false or destroyed ballots per instance. Election fraud, on the other hand, is the subversion of electoral mechanisms, processes and assets at key points into the voting process, and is usually carried out by a conspiracy of several entities involved in the electoral process, either through key individuals or whole institutions. Election fraud typically skews the result by an amount many multiples of the number of people involved, in the order of hundreds through to millions. Your examples of gerrymandering and voter suppression or disenfranchisement are great examples of actual election fraud that happen in public view in the US, and are a far greater threat to democracy than voter fraud. In fact, several measures meant to curb voter fraud (which happens very little anyway) are actually means of voter suppression: voter ID laws, residency proof requirements, exclusion of the criminally convicted, placement of polling stations in "safe" areas (read: less accessible from minority/poor neighbourhoods), etc etc. Taking away ballot drops and mail in ballots is yet another means of voter suppression in this vein, on par with a lack of public holidays for election days for people to actually be able to go to the polls.