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Harris embarks on sprint to find Democratic running mate (Callaghan O’Hare for The Post) The likely presidential nominee is mulling about a dozen potential vice-presidential candidates and plans to make a decision by Aug. 7.  By Patrick Svitek, Tyler Pager and Dan Diamond Read more   LIVE UPDATES Trump to meet with Netanyahu, address conservative group in Fla. By Amy B Wang, Patrick Svitek and Azi Paybarah   Olympians are approaching the limits of human performance By Adam Kilgore and Emily Giambalvo   Mexico says it wasn’t informed of operation to whisk Sinaloa cartel leaders to the U.S. By Mary Beth Sheridan and Nick Miroff   Opinion  |  The world has changed, and Trump needs a mulligan By Dana Milbank   Barack and Michelle Obama endorse Kamala Harris for president By Tyler Pager and Toluse Olorunnipa   Trump White House was warned sanctions on Venezuela could fuel migration By Jeff Stein, Ellen Nakashima and Samantha Schmidt   The life of two Boeing Starliner astronauts stuck indefinitely in space By Christian Davenport   COLUMN Money buys a better position. Just look at Southwest’s new seating. By Michelle Singletary   164,000-acre Park Fire was started by flaming car, Calif. officials say By Frances Vinall   ADVERTISEMENT   Mars rover discovers an ancient rock with a ‘potential biosignature’  By Joel Achenbach   Opinion  |  Who will control the future of AI? By Sam Altman   Lost dog survived in deep woods nearly two months: ‘She defied the odds’ By Sydney Page   ADVICE Did she wear a see-through dress to the wedding out of spite? By Carolyn Hax   QUIZ 10 questions, plus a bonus wager! It’s the weekend edition of On the Record.