Some GOP groups have encouraged legislators to amend the Constitution to preserve favorable conservative rulings and laws they fear the liberal Wisconsin Supreme Court could undo.

From the article:

The requirement to show a photo ID to vote in Wisconsin would be enshrined in the state Constitution under a proposed amendment Republicans introduced Wednesday, amid fears the new liberal majority on the Wisconsin Supreme Court could overturn the current law.

In addition, a Republican bill introduced Thursday proposes withdrawing Wisconsin from a national nonprofit that collects and cross-compares voter registration data to detect possible instances of double voting.

The draft constitutional amendment would require photo IDs in all elections while allowing the Legislature to establish exceptions to the requirement.

“Ensuring the legitimacy of votes in an election is a prerequisite of democratic government,” draft amendment proposal authors Rep. Patrick Snyder, R-Schofield, and Sen. Van Wanggaard, R-Racine, said in a memo to legislators introducing the measure.