Nikki Haley gives Donald Trump her ’strongest endorsement’ at RNC

Nikki Haley, Trump’s former GOP primary rival, officially endorsed the former president for the first time after walking out to applause and some boos. Trump stood up to applaud. Subscribe to ABC News on YouTube: ABC News Digital is your daily source of breaking national and world news, exclusive interviews and 24/7 live streaming coverage. Download the ABC News app for the latest headlines and alerts: Watch 24/7 coverage of breaking news and live events on ABC News Live: Watch full episodes of World News Tonight with David Muir here: Read ABC News reports online: ABC News is the home to the #1 evening newscast “World News Tonight” with David Muir, “Good Morning America,” “20/20,” “Nightline,” “This Week” with George St