A controversial move by a former president has reignited a long-simmering debate over daylight saving time, as the public exposure of a senator’s personal contact information reshapes his reelection campaign. The incident stems from opposition to a stalled bill aimed at eliminating the biannual clock changes, sparking a broader political clash in the Senate. With tensions already high, the fall could bring a heated battle over whether to keep or abandon the practice. The fallout highlights how contentious even seemingly mundane policy issues can become in today’s polarized political landscape.


President Trump’s doxing of Sen. Tom Cotton over a stalled bill to establish year-round daylight saving time is throwing an unexpected twist in the Arkansas Republican’s reelection race and sets up a fierce fight in the Senate this fall over the biannual changing of clocks. Trump’s decision to publish Cotton’s cellphone number on his Truth...