http://www.pewtrusts.org/~/media/legacy/uploadedfiles/pcs_assets/2012/pewupgradingvoterregistrationpdf.pdf Social Security with 6.5-million recipients over 112 years of age per a report by the Public Broadcasting System.
http://www.pbs.org/newshour/rundown/death-stop-social-security-payments/ Somewhere there are enough gaps and fraud in the system to erase Hillary's popular vote margin, IMHO.
Let me continue....
How about running a database match on the claims for tax refunds, the 112-year olds on Social Security, foreign addresses, zip codes with greater than 90% voting results for one party, and zip codes with more voters than are registered.
That’s a list that can be generated by freshman in computer science as a class project.