In the dead of night, charity workers head into the Arizona desert, with food and water for migrants trying to cross into the U.S. Not far away, a rancher says the people he sees constantly crossing his land are criminals. And an undocumented family shares what life is like for them, from running a small business to getting their kids into college, without immigration status. Matt Galloway travels to Arizona to meet these people and other voters, and learn why the border has become a flashpoint in this swing state — one that could decide who wins the looming U.S. election.