MSNBC's Ari Melber hosts The Beat on Thursday, August 29, and reports on the Harris-Walz ticket, the DNC and women's rights. Plus, Melber does a fact check of his interview with Trump aide Corey Lewandowski and is joined by legendary ballerina Misty Copeland for the latest Summit installment. Jen Psaki, Sophia Bush, Juanita Tolliver and Steve Benen also join.