Vice President Kamala Harris paid tribute to President Biden and rallied staff on Day One of her push to cement her place at the top of the Democratic ticket. Republicans are warning of possible legal obstacles to the Harris nomination, and the head of the Secret Service was on Capitol Hill answering questions about the assassination attempt on Donald Trump. Want more comprehensive analysis of the most important news of the day, plus a little fun? Subscribe to the Up First newsletter. Today's episode of Up First was edited by Roberta Rampton, Megan Pratz, Anna Yuhkananov, Janaya Williams and Alice Woelfle. It was produced by Ziad Buchh, Destinee Adams and Milton Guevara. We get engineering support from Arthur Laurent. And our technical director is Zac Coleman. Learn more about sponsor message choices: podcastchoices.com/adchoices NPR Privacy Policy