WASHINGTON, D.C. — As tensions between India and Pakistan escalated into open conflict this week, something miraculous happened in the United States: millions of Americans experienced their first peaceful morning without a single scam call about their car’s extended warranty, a suspicious Amazon order, or “urgent legal action” from the IRS. Officials at the FCC were initially baffled by the sudden radio silence. “We thought maybe our anti-robocall legislation had finally worked,” said Chairman...