evidence: Kari Lake claims opponent voted to allow undocumented immigrants to take cast a ballot Kari Lake said Tuesday that Democratic Arizona Rep. Ruben Gallego, her likely opponent in the state's US Senate race this fall, voted last week to let undocumented immigrants "illegally cast a ballot in this upcoming election." [...] Gallego did vote against a bill that would require proof of citizenship to register to vote in federal elections. However, when Gallego voted against the bill, he said "only U.S. citizens should vote."