I have a lot of experience with the American database of street addresses and standardization. I will guarantee that Trump will find a lot of voter fraud if you do sloppy data work. If you feed the software the minimal criteria such as just using the last name without the first name. The problem with the American database is that you can have a large number of people with the same last name living in the same local area. You need to use the street address or Social Security Numbers.

It will also depend on the software you are using. To process 200 million records will require specialized software. You can't just import it into Excel or Access and try to find duplicates.