For example, to improve the accuracy of Georgias records, state legislators last year required that information on a voter registration application match a drivers license, state ID card or Social Security record. Inconsistencies can cause a voters registration to be flagged as pending while the discrepancy is investigated. Fox News As the secretary of state told radio host Erick Erickson, there are 75,000 pending voters among a record total of 7 million registered in the state. Of these, 9,224 are minors under 18; 2,935 used a fake address; 3,393 are not citizens, and 5,842 were already registered. Of the remaining  applications, 75 percent submitted erroneous Social Security information . Almost a quarter  of those sloppy forms came from a registration effort by the New Georgia Project, a group founded in 2014 by Stacey Abrams, the Democratic nominee for governor. Abrams seems unconcerned about voter integrity, telling a crowd in Jonesboro that the "blue wave" would include "those who are documented and undocumented. She later claimed she didnt mean to imply noncitizens should actually vote.
(I added the math in brackets above).
Erroneous social security information would be a hallmark of fake IDs possessed by illegal immigrants. How many races would an extra 10,000 Dem votes swing?
There are many other examples at the link, including Texas, California, Pennsylvania, and Michigan.