National Journal: “President Obama and GOP presidential candidate Mitt Romney must face down a dubious and slippery opponent in Nevada this November. The mystery foe cannot be tamed with television ads and never breaks a campaign pledge. Its name is ‘none of these candidates.’ Nevada is the only state in the nation to offer voters the quirky ballot choice, and for more than three decades, statewide candidates here have had to contend with it. But this year, nervous Republicans have filed a federal lawsuit to try to oust ‘none’ from the ballot.”