Summary: Tuesday on the NewsHour, Russia targets Ukraine's power supply causing widespread blackouts, but Ukrainian civilians remain defiant. Candidates in high-profile contests spar over key issues on the debate stage, while others outright refuse to confront their opponents. Plus, Utah's Great Salt Lake shrinks to unsustainable levels amid a decades-long megadrought. PBS NewsHour is supported by - https://www.pbs.org/newshour/about/funders
