Lydia Moynihan

Gail Slater, Donald Trump’s head of antitrust, is tasked with a formidable agenda that requires precision: Foster a business-friendly environment that lets tech companies stay big enough to compete with China while ensuring they don’t become excessively dominant. “It’s about enforcing antitrust robustly in a way that works for all Americans … that’s my starting point,” Slater, 53, told me in her first interview since taking on her role as...