President Obama on the keys to democracy's survival, healing racial divide

As Juneteenth approaches, the former president says he trusts in a new generation fighting for equal rights.

The world has and continues to change in so many monumental ways since former President Barack Obama's eight years in office. Today, he says he stays awake at night thinking about how democracy can flourish in our constantly evolving world. Watch "Juneteenth: Together We Triumph - A Soul of a Nation Special Event" FRIDAY at 9 p.m. ET and next day on Hulu. "We're now seeing state legislatures try to further suppress the vote or allow partisan politics to infect voting results and election results. That troubles me," Obama told "Good Morning America" host Michael Strahan in an exclusive interview.