Both major presidential candidates are making appearances Thursday meant to fire up their core supporters, with Vice President Kamala Harris participating in a livestream with Oprah Winfrey and

Vice President Kamala Harris joined host Oprah Winfrey at a star-studded campaign event in Farmington Hills, Michigan, on Thursday, which was live-streamed across multiple platforms. Why it matters: Harris campaign advisers see the "Unite for America" event that's aimed at getting people to register to vote as a huge opportunity to reach a broad cross-section of persuadable voters.