Voter fraud is the fraud

All of the regressive voter suppression laws argue that we need certain kinds of ID to prevent rampant voter fraud. Today the bi-partisan Presidential Commission on Election Administration laid waste to such claims. "A Justice Department study found that between 2002 and 2005, just 40 voters (out of 197 million votes cast for federal candidates) were indicted for voter fraud, and just 26 resulted in convictions or guilty pleas." Since the regressive 'reason' is utterly false then what could be their possible motive?