It was disappointing but not surprising that Gov. Sam Brownback didn't mention in his State of the State address last week the 20,000 Kansans who have had their voting rights suspended. Brownback has tried to back away from this issue, leaving it to Secretary of State Kris Kobach and the courts to resolve. On Friday, staff at the U.S. Election Assistance Commission rejected Kobach's request to allow Kansas to go beyond federal rules and require proof of citizenship in order to register to vote. As governor – and as the person who signed the law that created this mess – Brownback has a duty to defend the voting rights of Kansas citizens.