Portland Infrastructure: An investigation is underway after an explosion blew the cover off a CMP electrical vault on Exchange Street Sunday, sending bricks onto a sidewalk and sparking a small fire; the Middle and Exchange intersection was shut down while crews checked for damage and confirmed no gas leak, though some customers may have lost power. U.S. Senate Politics: Maine Democrats officially chose Troy Jackson as their nominee to replace Graham Platner and challenge Sen. Susan Collins, ending a chaotic scramble after Platner’s withdrawal; Jackson’s win sets up a 101-day sprint to Election Day. Immigration Enforcement Scrutiny: Trump’s “border czar” Tom Homan told CNN he doesn’t know the status of ICE agents tied to fatal shootings in Maine and Texas, saying the policy is usually administrative leave during investigations. Public Safety—Air Travel: A Delta flight from Portland to LaGuardia returned to the Portland Jetport after reporting smoke in the cockpit; all 78 aboard landed safely. Local Crime: Lewiston police are investigating shots fired early Saturday that hit three vehicles and damaged nearby buildings; investigators collected nearly two dozen shell casings. Sports & Community: Ironman 70.3 Maine in Augusta drew record participation, with organizers citing growing economic impact.