Kobach used that system in Kansas and managed to catch 10 people. All but one were Republicans who were accidentally registered in multiple states.
http://kcur.org/post/kansans-caught-crosscheck-system-singled-out-kobachs-voter-fraud-campaign#stream/0
It's not a popular system in Kansas.
Edited by limenats at 12:25:13 on 06/30/17