text:  Live from NPR News in Washington, I'm Lakshmi Singh. The public is hearing from Vice President Kamala Harris for the first time since President Biden exited the presidential race and endorsed her for the nomination. Harris is at an event celebrating the National Collegiate Athletic Association at the White House. She used the occasion to praise Biden's decades of public service, including his presidency. Joe Biden's legacy of accomplishment over the past three years is unmatched in modern history.