CNN's Randi Kaye travels throughout the battleground state of Florida, home to an aging population of transplants whose politics reflect just how divided the rest of the country is. Given everything at stake, their vote this year might change the course of the nation forever.

CNN provides a closer look on the nationwide quest for answers in the Gabby Petito homicide case and her fiancé, Brian Laundrie; Randi Kaye investigates.