Some call it “caging.” Others label it “voter suppression.” The ACLU says 30 states since 2008 have introduced laws making it harder to cast a ballot. “In fact, while documented instances of voter fraud are almost nonexistent—nationally, the Department of Justice found just 26 cases over a three-year period—up to 5 million potential voters may be kept from the ballot box by these laws,” the ACLU said in a recent newsletter. Now Sacramento is weighing in. The state Senate on Monday approved Senate Joint Resolution 29, calling for a federal investigation into voter-ID laws and similar Republican-led efforts. Does voter suppression exist?