Wisconsin is not only an electoral battleground state, it is ground zero in the fight to ensure honest elections.

Failing to recall Republican Gov. Scott Walker in 2012 or to defeat him in the 2014 election, union-backed legal groups are continuing their efforts to try to make voter fraud easier to commit.

Rebuffed by the U.S. Seventh Circuit Court of Appeals, the American Civil Liberties Union (ACLU) has filed a petition at the U.S. Supreme Court asking the court to overturn Wisconsin’s Voter ID law. On Thursday, Attorney General Brad Schimel’s communications director Anne E. Schwartz responded to an email, saying only that, “We will continue to defend the Wisconsin Voter ID Law.”

Enacted in 2011, Act 23 requires voters to show one of several forms of photo identification before voting.

Wisconsin is one of 17 states that have added a voter ID law following the Supreme Court’s upholding of Indiana’s photo ID law in 2008. A total of 34 states now require some form of ID to vote, according to the ACLU’s petition.

Read more of ACRU Senior Fellow Robert Knight’s column at the Daily Caller.