When his camera stopped working on his iPhone recently, New Yorker Richard Medina didn't waste any time. With the threat of tariff-fuelled price hikes on smartphones bearing down, he quickly called his phone company for a new one. "I said, 'We've got to switch this out now,'" the 43-year-old recalled. "Let's take care of it." The move was a sign of the pressure rising across the US, where households are being buffeted by what could be staggering price rises, and even possible shortages triggered by the sweeping tariffs that US President Donald Trump announced this month. Some are trying to...