As we stumble into the home stretch of one of the most divisive presidential elections in recent history - complete with eyebrow-raising rhetoric on guns and voter fraud - there's plenty of edginess to go around. It was evident Saturday night at a Trump event in Reno, Nevada, where some in the crowd yelled that they'd seen a gun pulled out (after a thorough Secret Service search, it became clear that they hadn't.) And it's clear across the country, where many election officials are on far greater alert for possible intimidation or even violence on Election Day.