Yes there is widespread voter fraud, as in geographically widespread. Almost every large city has some voter fraud and usually in favor of democrats. However, it has been investigated intensely by Republicans, yet these no credible evidence of large scale voter fraud such as would alter the outcome of anything but a razor thin election. It's just Trump's excuse if he loses bigly to Hillary.
The majority of Democratic voter "fraud" cannot be easily exposed. Democratic operatives vote for other people. Nursing home and hospice patients have a better voting record than the general public. They write in votes for anybody they can get identifiers for. They bus derelicts to the polls for a free ride and a sandwich afterward. Most of it is not as illegal, as it is depraved.
If Democratic voter "fraud" cannot be easily exposed than stories about it are anecdotal at best. Both the Democrat and Republican parties spend time, money, and resources getting people to the polls to vote, but with Republicans it's trying to convince some very independent minded people that there is a difference between even a moderate Republican and a Democrat.
It's much easier for Democrats to use government programs to hook people on taxpayer dollars and then tell them Republicans are a threat to that money. Eventually such a system must fail, but you're not going to convince many government dependent people to vote to cut their own support based on some prediction of system failure years or decades into the future. It takes a nuanced approach that spares current voters the consequences of their vote, yet convinces them it's the right thing to do for nation's future. Trying to convince right wing voters of that is like trying to convince cattle not to sh*t where they eat.
